Trees and infrastructure consents outside planning

Protected trees lose their usual protection inside some consent regimes. Where a scheme is authorised by a development consent order under the Planning Act 2008, by an order under the Transport and Works Act 1992, or by a hybrid Act of Parliament, the order itself can disapply Tree Preservation Order controls over the land it covers. The trees infrastructure consent order question for anyone advising on an affected site is therefore not whether the TPO survives. It is what the order puts in its place, and when you have to say something about it.

The consent regimes that sit outside the planning Acts

Four routes matter in practice.

A development consent order under the Planning Act 2008 authorises nationally significant infrastructure, from electricity generating stations and overhead lines to major road and rail projects. The Secretary of State decides, the Planning Inspectorate examines, and the order grants a bundle of consents in one instrument.

Transport and Works Act 1992 orders cover guided transport and some inland waterway works, with a similar structure and a similar power to modify other legislation. Hybrid Acts, used for the largest railway schemes, do the same thing by primary legislation and carry deemed planning permission.

Separately, felling outside any of these regimes still needs a felling licence from the Forestry Commission under the Forestry Act 1967 once the volume passes the exemption. The exemption allows 5 cubic metres in a calendar quarter, of which no more than 2 cubic metres may be sold. Plenty of site clearance quietly exceeds that.

How an order disapplies tree controls

Open almost any made development consent order and you will find an article dealing with the felling or lopping of trees, and usually a separate article covering trees subject to a Tree Preservation Order. The drafting typically permits the undertaker to fell or lop a tree, or cut back its roots, where that is needed to prevent obstruction or danger to the authorised works, notwithstanding the order that protects it.

That is a statutory disapplication, not a consent you apply for. There is no section 211 notice in a conservation area, no TPO application to the local planning authority, and no appeal to the Secretary of State under the 2012 regulations. The controls are replaced by requirements written into the schedule of the order.

Two limits are worth holding onto. The power is normally confined to the order limits, so a tree just outside the red line keeps its full protection. And the power is usually expressed as being for the purposes of the authorised development, so clearance for an unrelated reason is not covered.

Protected trees inside the corridor

A linear scheme will cross woodland blocks, hedgerow trees and individual specimens that happen to be the most valuable trees in a parish. The arboricultural work still happens, it just happens inside the order process rather than inside a planning application.

Expect the applicant's environmental statement to include an arboricultural chapter built on a BS 5837 survey, with trees categorised, root protection areas calculated and a loss schedule by category. Where the scheme is environmental impact assessment development, the Town and Country Planning (Environmental Impact Assessment) Regulations 2017 or the equivalent infrastructure regulations require the environmental statement to be prepared by competent experts, so the arboricultural assessment should carry a named, qualified author.

Ancient woodland and veteran trees sit in a different category again. National policy treats them as irreplaceable habitat, and the standing advice from Natural England and the Forestry Commission sets out buffer expectations and what counts as wholly exceptional justification. An order that takes ancient woodland will have had to argue need, alternatives and compensation in detail, and that argument is the one to read first. Trenching and excavation near retained trees raise the same questions as on any site, and the sequencing issues in utility trenching close to trees apply with more force where the corridor is fixed by the order.

Mitigation secured through the order rather than by condition

The schedule to a development consent order contains requirements, which do the job conditions do in a planning permission. Tree protection usually appears in three places.

• A code of construction practice, approved before the works start, covering ground protection, no-dig construction, and supervision by an arboriculturist.
• A landscape and ecology management plan setting out replacement planting, establishment maintenance and a monitoring period.
• Site-specific requirements for named features, such as a retained veteran tree with an agreed exclusion zone.

The discharging body for most requirements is the relevant local planning authority, which is the single most useful fact in this area. The council loses its TPO jurisdiction and gains an approval role over the detail, so the place to press for better tree outcomes is the requirement wording during examination, then the discharge submission afterwards. A financial guarantee can sometimes be attached to replacement planting, in the same way that tree bonds work through a planning obligation on a conventional scheme.

Replacement planting at landscape scale

Replacement ratios on infrastructure schemes are negotiated rather than fixed, and the figures quoted in a consultation are usually expressed as area or as stems rather than as a like-for-like swap. That shift from individual trees to hectares is where local objections concentrate, because 10 hectares of new whip planting 3 miles away does not replace a 200 year old oak on a village green.

Three questions separate a plan that will work from one that will not. Where is the land, and is it secured by a real interest rather than an aspiration. Who maintains it, for how long, and what is the agreed failure replacement rate. And what species mix is proposed against the site's soils and the current plant health position, because biosecurity constraints have narrowed the practical palette. The handling measures in biosecurity for tree works matter as much on an order scheme as on a housing site.

Establishment is the weak link. Whip planting with no irrigation provision in a dry spring fails, and a monitoring requirement with a 5 year period will have expired before anyone notices the failure rate on the later phases.

Where local tree policy still carries weight

Disapplication of the TPO does not make the local plan irrelevant. For development consent orders, section 104 of the Planning Act 2008 requires the decision to be made in accordance with any relevant national policy statement, but it also requires the Secretary of State to have regard to any other matters that are both important and relevant. Local plan landscape and tree policies fall squarely into that category, as do adopted supplementary planning documents and tree strategies.

So the argument is available. It is simply weighted differently from the argument in a council committee room, because the national policy statement will usually have established the need for the infrastructure before anyone reaches the trees.

Making representations about particular trees

The examination process rewards specificity and punishes general objection. If a named tree matters, the sequence that works is this.

1. Register as an interested party by the published deadline for relevant representations, because missing it limits what you can do later.
2. Submit a written representation that identifies the tree by its survey reference from the applicant's own schedule, with a plan extract and a photograph.
3. Say what you want: realignment, a no-dig solution, a revised construction access, or a specific requirement wording.
4. Ask for the point to be taken at an issue specific hearing if the written exchange stalls.
5. Follow the applicant's responses and the examining authority's written questions, and reply to both.

Illustrative example. A row of mature limes along a lane inside the order limits of a substation connection, all category B on the applicant's own survey, with the proposed cable route 2 metres from the stems. A representation asking for a trenchless crossing at that chainage, supported by the applicant's own root protection area figures, is a request the examining authority can test. A representation asking for the scheme to be refused because the trees are old is not.

After the order is made, the influence moves to the discharge of requirements. Ask the local planning authority to consult on the code of construction practice and the landscape plan, check the submitted documents against the examination commitments, and record the planting as built so the monitoring period means something.

PlanScope drafts an Arboricultural Impact Assessment and a Landscape Strategy from your site answers, and you can see which of the 66 report types apply before you start. Tree survey and impact assessment work to BS 5837 should be carried out or signed off by a qualified arboriculturist, and councils expect a named author. This is general guidance, not legal advice; the terms of a specific order govern what is permitted on that land.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.