Evidence base for a film studio on a former airfield

Film studio planning evidence looks nothing like the industrial evidence base a former airfield would otherwise attract. The scheme is quiet most of the time and then extremely active at three in the morning. Employee density is low by industrial standards, yet peak headcount is very high. And the ground underneath an airfield carries fuel, solvents, asbestos and sometimes ordnance.

Get the scoping wrong and you spend money on a conventional industrial transport assessment that tells the highway authority nothing about a 400 person crew call at 6am.

Why a studio does not fit a standard use class

There is no class for a film studio. Sound stages, workshops, production offices, backlots and exterior filming areas together do not sit comfortably in Class B2, and they fall outside Class E(g), which is limited to industrial processes that can be carried out in a residential area without detriment to amenity.

Most studio consents are therefore granted as sui generis, with a precisely drafted description of development and a set of conditions doing the work that a use class would otherwise do. That is an advantage if you draft it well. A sui generis permission with a schedule of permitted activities, hours, noise limits and a filming protocol gives the operator certainty and gives the authority control, and it avoids an argument three years later about whether a music video shoot is within the permitted use.

Write the description of development around what actually happens: stage floor area, workshop and construction space, production office floorspace, exterior filming areas, standby generation, crew parking, and whether visitor or audience use is proposed. Leave out anything you do not intend to do, because the conditions will follow the description.

On scale, the site will almost certainly be major development, and an airfield redevelopment will normally exceed the thresholds in Schedule 2 to the Environmental Impact Assessment Regulations 2017 for urban development projects. Request a screening opinion early. Check the current thresholds rather than relying on a figure from a previous scheme, because they have been amended.

Noise from stages, generators and exterior filming

The stages themselves are the least of the problem. A sound stage is acoustically isolated for recording, so the building envelope already performs well. The noise case is built from everything around it.

Six sources need assessing separately:

• Plant. Chillers, air handling and dehumidification serving large volumes, running continuously during production.
• Standby and temporary generation. Diesel sets brought in for exterior shoots are the single most common source of complaint, because they run overnight in positions that change week to week.
• Exterior filming. Special effects, vehicle action, simulated gunfire, crowd noise, tannoys and radio traffic, often at night.
• Deliveries and set construction. Articulated vehicles, forklifts, reversing alarms, timber workshops.
• Car parks and unit bases. Several hundred people arriving and leaving at unsociable hours, with doors, voices and engines.
• Construction of the studio itself, which on a site this size runs for years.

A noise impact assessment should assess plant against BS 4142:2014+A1:2019 at the nearest noise sensitive receptors, with a separate section for exterior filming assessed as a specific operation rather than as a rating level. Councils expect a suitably qualified acoustician and professional review is strongly advised.

The deliverable that matters most is the noise management plan secured by condition. It should set out notification to neighbours before exterior shoots, a curfew for amplified sound, limits at facade positions, a named contact, a complaints log, and a protocol for special effects. Operators who resist that end up with fixed hours instead, which is far worse commercially.

Lighting across a dark former airfield

Airfields sit in open country, and the surrounding area is often in a dark environmental zone under the Institution of Lighting Professionals guidance on obtrusive light. Studio lighting is intense, directional and used at night, which is the worst combination.

A lighting assessment should cover the permanent site lighting, the backlot and exterior filming lighting, and the glow from stages when doors are open. Report obtrusive light limits for the relevant zone, upward light ratio, vertical illuminance at the nearest windows and the effect on bat commuting routes. Design in zero upward light, full cut-off luminaires, column heights kept low, warm colour temperature and a curfew.

Set lighting is the hard case because it changes with every production. The workable answer is a lighting strategy approved by condition, with maximum intensities and directions for defined filming zones, plus a requirement to submit a lighting plan for shoots above a stated scale.

Transport, crew parking and shift patterns

Studio traffic does not behave like industrial traffic. There is almost no dependable trip rate data, so build the assessment from first principles using the operator's own crew numbers, call times and wrap times, then test the result against observed peaks on the network.

A transport assessment for a scheme of this kind should deal with:

1. Crew arrivals and departures by production, with staggered call times and the worst case where several productions overlap.
2. Parking supply for crew, cast, unit vehicles, honey wagons and trailers, with the circulation and compound areas shown.
3. Heavy and abnormal loads for set deliveries, with swept paths and a route agreed with the highway authority.
4. Shuttle provision from the nearest railway station, coach parking and layover.
5. Construction traffic over the build programme, in a construction traffic management plan.
6. A travel plan with a named coordinator, because the shift pattern makes conventional measures useless and the realistic interventions are shuttles, car sharing and a minibus.

Rural airfields are usually reached by a single B road through a village, and that is where the objection will come from. Offer a routeing agreement and a lorry management system rather than waiting to be asked.

Where offices are fitted out above existing floor space, remember that an inserted mezzanine can itself be development and can affect the floorspace figures used for thresholds, as we cover in mezzanine floor planning reports.

Contamination, ordnance and buried infrastructure

An airfield is a contaminated land site until proved otherwise. The desk study should pull RAF and Air Ministry historic plans, wartime and post-war aerial photography, fuel installation records and any decommissioning reports.

Expect to find aviation fuel storage and distribution, hydrant mains running under the aprons, chlorinated solvents and oils at maintenance hangars, asbestos cement sheeting and asbestos insulation in hangars and huts, firefighting foam residues at fire training grounds, buried demolition arisings, and unrecorded soakaways.

A land contamination assessment runs as a Phase 1 desk study followed by Phase 2 intrusive investigation in accordance with BS 10175, and both must be prepared by suitably qualified and experienced persons, with the local planning authority expecting that explicitly. A draft is a starting point for that professional rather than a substitute for the investigation.

Two things sit outside the standard contamination scope and need separate specialists. Unexploded ordnance risk, where the airfield was a bomber or munitions station, which drives a risk assessment and often magnetometer survey before any intrusive work. And aerodrome safeguarding, if the airfield remains licensed or is safeguarded for defence purposes, which can constrain building heights, lighting and anything that attracts birds.

Ecology on long-grassed airfield land

Decades of unfertilised mowing produce grassland that is often far more valuable than it looks. Airfields regularly support species-rich calcareous or acid grassland, large skylark populations, lapwing, and reptiles sheltering under cracked concrete.

Commission a preliminary ecological appraisal before the masterplan is fixed, and expect it to recommend breeding bird surveys between March and August, reptile surveys between April and October, and bat surveys of hangars and bunkers with emergence work between May and September. Protected species surveys and any mitigation licence require a suitably licensed ecologist under the Wildlife and Countryside Act 1981 and the Conservation of Habitats and Species Regulations 2017, and the draft report is a starting point for that ecologist.

Mandatory biodiversity net gain applies, and on a site like this the baseline can be high, which makes the 10 per cent uplift expensive. The statutory metric must be completed by a competent person under the Environment Act 2021 regime and the biodiversity gain plan is approved by the authority after permission. Run the baseline early, because it may change the amount of grassland you can afford to build on.

Drainage, water and electrical load

The site area will exceed one hectare, so a flood risk assessment is required regardless of flood zone, and a drainage strategy should take advantage of the obvious opportunity: an airfield is already almost entirely impermeable, so a scheme that breaks up redundant runway and taxiway can deliver real betterment in run-off rates.

Water demand is higher than people expect, because effects tanks, rain towers and set washing use a lot. Ask the water undertaker for a capacity position early.

Electrical load is the constraint that most often sets the programme. Stage lighting, air handling and workshop plant add up, and a grid connection on a rural airfield can take years. A utilities assessment and an energy statement should be prepared together, with on-site generation and storage considered as a way of reducing the connection requirement rather than as a sustainability gesture.

Economic evidence and the order to commission work in

The planning case for a studio is substantially an economic one, so the economic impact assessment carries weight rather than sitting at the back of the pack. Set out construction and operational employment, the supply chain, training and skills commitments, and the relationship to any employment land allocation covering the airfield. Where the site is allocated for other uses, an employment land assessment addressing the loss is needed too.

Sequence the work like this. Screening opinion and constraints desk study first. Ecology baseline and contamination Phase 1 next, because both can change the developable area. Then the operator's activity schedule, because noise, lighting and transport all depend on it. Masterplan after that. Reports last.

Those thresholds are the ones PlanScope uses to flag which reports a site is likely to need, and councils' own validation lists and national policy thresholds take precedence over them. You can browse all 66 report types to see the full set.

This is general guidance, not legal advice; confirm the required documents with your local planning authority before you commission anything. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.