Section 6

Phase 2: the city centre spine and network extension

Phase 2 delivers the city centre infrastructure that turns the Phase 1 commuter network into a through-city rapid transit system. At its core is the L1 city centre tram line already endorsed at public consultation, extended at each end so that it runs as a single line from Seacroft in the east to Belle Isle in the south, through the city centre and Leeds station. Where Phase 1 raises seven existing rail corridors to metro standard, Phase 2 builds the spine those corridors feed and interchanges with them at Leeds station. It also establishes direct rail connectivity to the Leeds Bradford Airport terminal on a route already partially funded, using a small, dedicated tram-train fleet.

Phase 2 is more ambitious in its new-build requirements than Phase 1 and carries commensurately more programme risk. One element, the airport spur, requires detailed feasibility assessment before its cost can be stated with full confidence, and a range is presented on that basis.

6.1 The L1 city centre spine

The starting point for Phase 2 is the L1 route, the city centre tram alignment that received the highest level of support in the 2024 public consultation and which Leeds City Council formally endorsed as its preferred option. This proposal does not seek to reinvent that work.

The L1 route runs from St James’ University Hospital westward via the First Direct Arena, Leeds Beckett University, Millennium Square, East Parade, Infirmary Street, City Square and Leeds rail station to Victoria Bridge. It connects key institutions, passes through the commercial core and serves the principal transport interchange at Leeds station. It is adopted here as the central spine of Phase 2. Extended at both ends, the L1 becomes a single through-line: the Seacroft extension carries it eastward beyond St James’ and the Belle Isle route carries it south from the Leeds station end, so that Seacroft and Belle Isle become its two termini with the city centre spine and Leeds station in between.

As a city centre alignment, L1 is benchmarked against the Manchester Metrolink Second City Crossing at £291.10m per mile in 2025/26 prices. Applied to the 2.13 miles alignment this gives an estimated cost of £620m.

6.2 New stations

Phase 2 includes three new stations on existing rail alignments: Laisterdyke, Armley and Elland Road. All three require platforms, shelters, signalling adjustments and public realm works, but no new trackwork. They are bounded site interventions with definable planning footprints and containable utility interfaces, placing them in a materially lower risk category than the new-build tram sections. A fourth new station, at Leeds Bradford Airport, requires a new rail extension and is treated separately in section 6.3.

Each new station is costed at £32.5m including a 30% contingency. Laisterdyke and Armley together are delivered for a combined £65m.

Adding and reopening stations on existing lines is a well-trodden, incremental activity rather than a novel one: stations have reopened progressively across the national and regional network for years, on standard designs and predictable timescales. Laisterdyke, closed in 1966, is a reopening of exactly this kind. That track record is part of why these sites sit in a lower-risk category than new tram construction.

6.2.1 Laisterdyke

Laisterdyke sits on the Calder Valley line in east Bradford. Trains from Bradford Interchange toward Leeds pass directly through it and do not stop. The station closed in 1966 and the community has been without rail access since, despite the track running through the middle of it.

East Bradford ranks among the more deprived areas in the region and has among the lowest rates of car availability. A station here places Bradford Interchange, New Pudsey, Bramley and Leeds within a single direct service, on an alignment already being electrified under Phase 1. The Calder Valley corridor currently has three intermediate calling points across roughly eleven miles of continuous urban development; Laisterdyke and Armley together raise that to five.

Estimated cost: £32.5m including 30% contingency.

6.2.2 Armley

Armley fills a significant gap in rail coverage for one of the most populous inner-city communities in Leeds. The Calder Valley line passes through Armley without stopping, and passengers must travel to Bramley or Leeds station despite sitting directly on the route. A station here provides direct rail access to the city centre and to Bradford.

Estimated cost: £32.5m including 30% contingency.

6.2.3 Elland Road

The Elland Road stop on the Doncaster to Leeds line provides direct rail access to Elland Road Stadium, currently unreachable without alighting at Leeds station and taking onward transport, an arrangement that generates significant road congestion on match days.

Estimated cost: £32.5m including 30% contingency.

6.3 Leeds Bradford Airport spur

Leeds Bradford Airport is the largest airport in Yorkshire, handling millions of passengers annually through a terminal accessible by car, by taxi, or by an infrequent bus taking forty-five to fifty minutes from Leeds city centre. It has no rail connection, and this is not for want of trying.

WYCA has spent close to a decade developing proposals for a Parkway station on the Harrogate line between Horsforth and the Bramhope tunnel, approximately one mile from the terminal and connected to it by shuttle bus. The scheme has an approved Outline Business Case and is classified as very high value for money, with an estimated capital cost of £42m and £5m already secured. It was planned to open in 2024 but has not broken ground, with rising costs triggering a deliverability review. This proposal instead integrates the airport with a stop at the terminal itself, using rolling stock decisions made in Phase 1 to make it possible.

6.3.1 The gradient constraint

Leeds Bradford Airport is the highest airport in England at 208 metres above sea level. The elevation change from the Harrogate line up to the airport plateau produces gradients that, as WYCA’s own feasibility work found, exceed the typical maximum a heavy rail vehicle can sustain over distance. A direct heavy rail spur to the terminal was estimated at £350m to £400m and deemed economically unfeasible because of the tunnelling required. That is why the Parkway station, rail to a point a mile short of the terminal plus a bus, became the preferred option.

6.3.2 Why tram-trains change what is possible

Stadler Rail CityLink units, designated British Rail Class 398 and currently being introduced in Wales, are rated for gradients of up to 7%. The approximate gradient from the Harrogate line to the airport plateau over the spur is around 4%, well within tram-train operating parameters and beyond conventional heavy rail capacity. This is not a novel observation: the airport’s own strategic development plan, published for public consultation, specifically identified tram-trains as the solution to the gradient problem.

A spur of approximately 1.5 miles from the Harrogate line, diverging north of Horsforth near the entrance to the Bramhope tunnel, climbing to the airport and terminating at a new station at the terminal building, is achievable with tram-train technology in a way that it is not with conventional rolling stock. The civil engineering is non-trivial, since the gradient and rural terrain require careful design, but it does not require the tunnelling that made the direct heavy rail option prohibitive.

6.3.3 Service pattern and fleet

The spur is operated as a dedicated airport express: a limited-stop service between Leeds station and the airport terminal, running on the newly wired Horsforth corridor delivered in Phase 1 and diverging onto the spur north of Horsforth.

A limited-stop run of approximately eight miles, with turnaround at each end, supports a 15 minute headway on three units in traffic. A fleet of 4 units, three in traffic and one spare or under maintenance, is specified. At the unit price of £7.93m derived from the 2022 Frankfurt contract adjusted for inflation, the fleet cost is £31.7m. The fleet is dedicated to this service, its units specified for a single duty cycle, with maintenance concentrated at one facility and the vehicle choice for the rest of the network unaffected.

6.3.4 Funding

The existing Parkway station allocation offsets part of the cost. The £42m capital budget approved at Outline Business Case, with £5m already secured, was allocated for the purpose of improving rail connectivity to Leeds Bradford Airport. That objective is unchanged, only the delivery mechanism changes, from a parkway station with a shuttle bus to a direct connection to the terminal. Redirecting an existing allocation toward a superior outcome within the same stated objective is not a new spending commitment.

6.3.5 What the connection delivers

The Parkway station connects the airport to the Harrogate line and to Leeds station, with a shuttle bus transfer at the airport end. The airport express connects the airport to Leeds station directly, terminal to platform.

Leeds station is the convergence point of all seven Phase 1 corridors. A passenger from Bradford, Wakefield, Garforth, Dewsbury or Headingley therefore reaches the airport with one interchange, at a station their service already calls at, onto a turn-up-and-go service that ends inside the terminal. Under the Parkway model the same passenger changes at Leeds, changes again at Parkway onto a bus, and arrives at the terminal by road. Removing that second transfer is the primary difference, a transfer made with luggage, to a timetable the passenger does not control, at the end of the journey where the consequences of missing a connection are largest.

In Green Book terms the airport express does not create a larger set of origin-to-destination pairs than the Parkway station, since both are reached via Leeds. What it changes is the generalised cost of every one of those journeys, by removing an interchange penalty that applies to all of them. The Parkway station achieves a BCR of 4.3 with the bus transfer included in its generalised cost. Removing that transfer should improve the ratio, though the higher capital cost works in the opposite direction and the net effect requires modelling rather than assertion.

6.4 The Seacroft extension

The Seacroft route is adopted in Phase 2 as the eastern extension of the L1 line beyond St James’ University Hospital, making Seacroft the eastern terminus of the L1 through-line. Beginning on Beckett Street and heading northward, the route turns onto Harehills Lane, then Foundry Approach, pushing north to Gipton via Oak Tree Drive. It then turns onto Amberton Road and Foundry Lane, proceeding along South Parkway before making the final turn onto York Road and terminating at Seacroft Bus Station.

Distance: 3.33 miles. Estimated construction cost: £478m at the Trafford Park benchmark, sharing the L1 city centre section with inbound services. The corridor serves Harehills, Gipton and Seacroft, among the most deprived wards in the city, none of which has a rail alternative.

Figure 6.1 shows the indicative Seacroft alignment. See the maps for the full network diagram.

6.5 The Belle Isle route

The Belle Isle route is adopted in Phase 2 as the southern extension of the L1 line, making Belle Isle its southern terminus, joining the spine at the Leeds station end. The route begins in the Belle Isle area near the Belle Isle Circus roundabout and heads north toward Hunslet along Belle Isle Road and then Balm Road, before turning onto Hunslet Road. From there it proceeds toward the city centre, passing through the Leeds South Bank regeneration site, designated a Mayoral Development Zone, continuing to Leeds station or joining the L1 alignment.

Distance: 2.56 miles. Estimated construction cost: £368m. The route serves two purposes. Belle Isle and the Hunslet corridor are entirely reliant on buses for urban mobility. The route also passes through the South Bank Mayoral Development Zone, where the tram line supports the development density the designation assumes.

Figure 6.2 shows the indicative Belle Isle alignment. See the maps for the full network diagram.

6.6 Phase 2 risk profile

The consistent finding of infrastructure research, most influentially Bent Flyvbjerg’s work on megaproject cost overruns, is that linear urban rail construction is among the highest-risk infrastructure categories in existence. The reason is not the civil engineering itself but its linear nature: every metre of new surface-level urban track is a potential encounter with unmapped Victorian utilities, heritage assets requiring archaeological assessment, property boundaries requiring compulsory purchase, and traffic management schemes requiring negotiation with multiple stakeholders. These risks compound rather than accumulate, as each delay cascades through subsequent programme stages.

Phase 2 is structured with that finding in mind. The elements outside the tram alignments are all bounded sites rather than linear routes. The airport spur is a rural alignment diverging from existing track on land with limited development constraint. The new stations at Laisterdyke, Armley and Elland Road are defined plots on or beside existing Network Rail land, with known ownership. Managing cost risk on a defined site is a different category of problem from managing it across miles of Victorian urban development.

The new-build tram sections, L1, Seacroft and Belle Isle, carry linear construction risk concentrated in their urban sections. They carry it from a starting position within the funding envelope, with Phase 1 already operational while Phase 2 design matures. The sequencing set out in section 8 is itself a risk control.

6.7 Phase 2 cost summary