West Bowers: reservoirs and substantial mineral extraction
West Bowers Farm Products v Essex County Council (1985) 50 P&CR 368 concerns a reservoir proposed for agricultural irrigation. Digging it would also remove a substantial quantity of sand and gravel.
The Court of Appeal held that describing the intended end product as a reservoir did not remove the separate planning significance of mineral extraction on that scale.
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- Neutral citation
- (1985) 50 P&CR 368; [1985] JPL 857
- Court
- Court of Appeal (Civil Division)
- Judgment date
- 17th June 1985
- Judge
- Sir John Donaldson MR, Neill LJ and Nourse LJ
The reservoir was not a minor excavation
The farmers proposed a reservoir covering about 18 acres and reaching a depth of 6.5 metres at Woodham Walter in Essex. The extracted minerals would leave the site and be sold, although they would not be graded or processed there.
An Article 4 direction already required an application for the reservoir. The immediate dispute concerned whether the application also involved mineral working, with consequences for the advertising and fees required under the legislation then in force.
The farmers argued that extraction was simply part of the engineering work needed to create the reservoir. Their appeal was dismissed.
One process can have two substantial planning components
Nourse LJ explained that physical indivisibility does not settle planning classification. A single process may involve two activities, each substantial enough not to be merely ancillary to the other.
The assessment is objective and depends on the nature and extent of the works. The developer’s subjective motive is not decisive.
Here the amount of gravel to be removed was too substantial to be dismissed as incidental excavation. The development involved both mineral working and the engineering operation of constructing the reservoir.
Not every excavation is a separate mining operation
The judges expressly recognised the other side of the distinction. Digging ordinary foundations may incidentally remove minerals without creating a separate mining operation. Many cut-and-fill works also fall on that side of the line.
Scale, the nature of the activity and what happens to the material all matter. West Bowers does not impose an automatic separate-permission requirement whenever soil or gravel is moved.
The same underlying issue later arose in Eatherley, concerning whether basement works included a separate engineering operation. The cases require examination of the actual works rather than reliance on the project’s label.
Why the distinction matters for permitted development
A permission for one class of development does not necessarily authorise a substantial additional activity falling outside that class. The intended agricultural benefit does not, by itself, answer the question.
Read New World Payphones for a later application of the need for the proposed development to fit the relevant grant.
The 1977 development order and 1983 fee provisions in West Bowers are historical. A current reservoir proposal requires the applicable agricultural and minerals provisions to be checked separately.
Read the West Bowers report
The complete report is available to Gold Members. Its opening page is 368; the alternative page 386 appearing in some references should not be used.
West Bowers Case Law Page Updated: 12th September 2026