Mansi v Elstree Rural District Council (1964) 16 P&CR 153
Mansi is an early Divisional Court decision about the wording and effect of an enforcement notice. It is particularly useful for the distinction between correcting an inaccurate notice and allowing a notice to extinguish an established lawful use.
The appeal succeeded in part. The enforcement notice could stand, but it had to be amended so that the owner retained the pre-existing right to carry on limited retail sales from the nursery.
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- Neutral citation
- (1964) 16 P&CR 153
- Court
- High Court of Justice, Queen's Bench Division, Divisional Court
- Judgment date
- 17th January 1964
- Judge
- Lord Parker CJ, Paull J and Widgery J
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Retail sales had existed at the nursery for decades
Kenmore Nurseries at Elstree had been used for retail sales since 1922. Those sales were secondary to the nursery and horticultural use, and included produce grown on the site together with some bought-in goods.
After Mr Mansi took the nursery in 1959, the retail activity became more intensive. One glasshouse was renovated and gradually became primarily a shop.
The enforcement notice described the earlier use too narrowly
The notice alleged a change from agricultural use to use for the sale of goods. That description omitted the fact that some retail selling had already lawfully taken place for many years.
It also required the use of the glasshouse and forecourt for the sale of goods to cease completely.
An inaccurate recital did not automatically make the notice void
The court rejected the argument that the inaccurate recital necessarily invalidated the entire enforcement notice.
Following Miller-Mead, the modern enforcement appeal machinery then in force allowed errors to be corrected where they did not go to the substance of the matter and where amendment would cause no injustice.
The important practical point was whether the recipient understood the case he had to meet. On the facts, Mr Mansi plainly did.
But the notice could not remove an existing lawful use
The second part of the appeal was stronger. The Minister had found that retail sales formed an established subsidiary use before the material change occurred.
The notice nevertheless required all retail selling to cease. That went further than was necessary to remedy the breach and would have removed a lawful use which planning control did not authorise the council to extinguish.
The case was therefore sent back for the notice to be amended so that the established level and character of retail sales could continue.
Intensification is not automatically a material change of use
Widgery J also made clear that the owner could continue the lawful use and might be able to intensify it, provided the intensification did not itself amount to a material change of use.
That is a useful reminder that planning control is concerned with material changes in the character of a use. A lawful activity does not become unlawful merely because its level changes, although the point at which intensification becomes material is a matter of fact and degree.
Why Mansi still matters
The statutory provisions considered in 1964 have since been replaced, but two underlying principles remain useful:
- an enforcement notice should not be defeated by a correctable drafting error where no injustice is caused
- the requirements of a notice should not take away a lawful use which existed before the breach
Current enforcement appeals must of course be considered under the Town and Country Planning Act 1990 and the present statutory grounds of appeal.
Judgment source
Planning Geek holds a locally hosted copy of the reported decision. Gold Members can download the judgment below.
Related Planning Geek guidance
See our guide to enforcement appeal grounds and our explanation of enforcement notices.
Mansi Case Law Page Updated: 10th September 2026