2026 Update: PSDS & IETF closed. AIA gives 100% year-one relief on solar. 2026 active stack still delivers 40–60% effective subsidy. See 2026 grants →

UK aerospace solar — May 2026

Solar grants for UK aerospace manufacturing — Filton, Bristol, Derby, Cardiff and Belfast clusters.

UK aerospace is one of the largest single industrial decarbonisation challenges, and one of the strongest commercial solar opportunities. Scottish IETF has not been open since its last call closed in March 2025; English aerospace post-IETF uses AIA + PPA. Tier-1 primes and 240+ tier-2 suppliers across the UK aerospace cluster.

UK aerospace clusters and their solar funding routes

Filton (Bristol) — UK’s densest aerospace cluster

Anchor: Airbus UK Filton (wing design + manufacturing for entire civil Airbus fleet). Plus Rolls-Royce Aerospace, GKN Aerospace, MBDA, BAE Systems Filton, Spirit AeroSystems (formerly Bombardier). Roughly 240 tier-2 suppliers within 50-mile radius. Solar funding: AIA + PPA + (where eligible) Local Growth Fund (Bristol is in the West of England Combined Authority area). Bristol-specific guide.

Broughton (Wales) — Airbus wing manufacturing

Airbus UK Broughton manufactures wings for the entire civil Airbus fleet. Welsh Industrial Decarbonisation programmes have funded substantial PV deployment at Broughton and the Welsh aerospace supplier ecosystem (~80 suppliers across North Wales).

Derby — Rolls-Royce Civil Aerospace

Rolls-Royce’s main UK aerospace manufacturing site. The supplier ecosystem extends across Nottinghamshire, Derbyshire, Leicestershire. English IETF closed; supplier projects now use AIA + PPA.

Cardiff (Nantgarw) — GE Aviation Wales

One of the largest aerospace component manufacturing sites in Wales (LEAP-1A and LEAP-1B engine components). Welsh Industrial Decarbonisation programmes are active. The wider South Wales aerospace cluster (including Airbus Defence Newport) is one of the largest UK aerospace solar opportunities.

Belfast — Spirit AeroSystems Belfast (formerly Bombardier)

Wing structure manufacturing for Airbus and other OEMs. ~60 tier-2 suppliers within 30-mile radius. Invest NI Capital Grants are case-by-case for major industrial projects. Belfast-specific guide.

Prestwick (Scotland) — Spirit AeroSystems Prestwick

Scottish aerospace manufacturing. SIETF is closed (last call March 2025); tier-2 suppliers should plan on the AIA and the 50% special-rate first-year allowance. Scottish IETF.

Coventry — UKBIC battery, JLR powertrain, automotive R&D

Dual-use cluster — automotive R&D plus aerospace component manufacturing. Coventry guide.

Jet Zero Strategy and aerospace solar narrative

The UK Jet Zero Strategy (published 2022, refreshed 2024) commits the aerospace industry to net-zero-by-2050 with interim targets. Neither the IETF nor the Scottish IETF is open and neither funded solar PV; Jet Zero now matters through customer and procurement pressure. For English/Welsh aerospace post-IETF closure, the Jet Zero framework continues to drive customer and procurement-side decarbonisation pressure on the supply chain — which makes the underlying business case for solar stronger even without a direct grant.

Worked example — typical UK aerospace tier-2 supplier 2026

A representative UK aerospace tier-2 supplier (precision machining, composite components, surface treatment): 1.8 GWh/year electricity demand, 4,500 m² rooftop:

  • System size: 600 kWp rooftop
  • Headline capex: £450,000 turnkey
  • Annual Investment Allowance tax saving: £112,500 (25%)
  • Net cost: £337,500
  • Annual savings: £125,000
  • Payback: 2.7 years

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Aerospace solar FAQs

Are UK aerospace manufacturers eligible for solar grants?
Tier-1 UK aerospace primes (Airbus UK Filton/Broughton, Rolls-Royce Derby/Bristol, GKN Filton/Cowes, BAE Systems aerospace, MBDA, Spirit AeroSystems Belfast) have substantial decarbonisation programmes. Scottish aerospace tier-2 suppliers also use AIA + PPAs; SIETF closed in March 2025. English/Welsh aerospace tier-2 suppliers post-IETF closure use AIA + PPAs. NI aerospace (Spirit Belfast supply chain) accesses Invest NI Capital Grants. With the IETF closed since July 2025 and no successor, aerospace suppliers build the solar case on AIA, PPAs and their customers’ net-zero commitments.
What solar projects suit UK aerospace manufacturing?
Aerospace facilities are typically large industrial sites with substantial flat roof inventory (5,000-50,000 m²). Project sizes 500kWp-5MWp common. Self-consumption rates 75-90% on properly sized systems given continuous machining loads, environmental control for aerospace tolerance, and 24/7 cleanroom areas. Filton (Bristol) is the densest UK aerospace cluster; Broughton (Wales), Derby (Rolls-Royce), Belfast (Spirit), Prestwick (Scotland), and Cardiff (GE Aviation Wales) are the other major clusters.
Can aerospace tier-2 suppliers apply for IETF or SIETF funding? No. The IETF closed in July 2025 with no successor planned, and Scotland’s SIETF last call closed in March 2025 with no new call announced; use the AIA and PPAs.
Scottish tier-2 aerospace cannot apply either: SIETF closed in March 2025. English tier-2 aerospace lost direct IETF access when Phase 3 closed Spring 2024 — now use AIA + PPAs.
How does Jet Zero Strategy affect aerospace solar funding?
The UK Jet Zero Strategy commits the aerospace industry to reduce direct emissions and supply chain emissions in line with net-zero-by-2050. Aerospace IETF applications (where IETF was open) scored well when narrative anchored on Jet Zero alignment plus the supplier's role in primary manufacturer net-zero commitments. Even post-IETF closure, the Jet Zero framework continues to shape Welsh, NI and Scottish aerospace decarbonisation funding routes.

Funding by asset class

The allowance depends on the asset, and most pages on this topic get it the wrong way round. Solar PV is special-rate expenditure (HMRC Capital Allowances Manual CA22335), so the 100% year-one route is the Annual Investment Allowance — Full Expensing is a main-rate measure and does not reach it. Battery storage, EV charging and heat pumps are Heat pumps for space or water heating are special-rate: AIA, then the 50% FYA. Standalone batteries are probably main-rate (full expensing for companies), but HMRC has no specific guidance; confirm with your adviser.

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What you get
  • 1. A short written funding note naming every scheme your site qualifies for in 2026 — and the ones it does not.
  • 2. Indicative system size and a capex band for your roof.
  • 3. Year-one tax treatment per asset in £ — solar is special-rate expenditure, so the route is the Annual Investment Allowance; heat pumps for building heating are also special-rate integral features, and standalone battery storage is probably main-rate plant (HMRC has no specific guidance, so confirm with your adviser). Most pages get this the wrong way round.
  • 4. Projected SEG export revenue at current rates.
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