"3. The working of the minerals shall proceed in accordance with the stages indicated on Plan A attached to this permission unless the Local Planning Authority shall have approved in writing an alternative phasing of operations. 4.The soil of the area of excavation to a depth of 12" shall be removed and separately stored from other materials until required for re-spreading."
"(2) In this Act, except where the context otherwise requires, the expression `development' means the carrying out of building, engineering, mining or other operations in, on, over or under land, or the making of any material change in the use of any buildings or other land."
"(1) In relation to development consisting of the winning and working of minerals, the provisions of this Act shall have effect subject to such adaptations and modifications as may be prescribed by regulations made under this Act with the consent of the Treasury."
"Regulations made for the purposes of this section shall be of no effect unless they are approved by resolution of each House of Parliament."
"Development consisting of mining operations shall be taken to be begun on the earliest date on which any of the mining operations to which the relevant grant of planning permission relates begin to be carried out."
"The winning and working of minerals other than excepted minerals in, on, or under land whether by surface or underground working."
"The judgment of Eveleigh LJ in Malvern Hills District Council v Secretary of State for the Environment(1982) 46 P&CR 58 emphasised that the test to be applied is not the `quantum' of the work involved but whether that work was `related to the planning permission involved'. The question to be asked here, which the inspector did not ask, is: `Was the work related to the 1973 permission?' It is accepted, and rightly so, that the onus of establishing this must rest upon the appellant as the person who seeks to prove that `the development has begun within the five- year limit contained in condition (1).' In the Malvern Hills case the majority of the Court of Appeal held that the accurate marking out of a proposed road with pegs amounted to an `operation' in the course of laying out part of a road and therefore qualified under section 43(2)(d). In his minority judgment Lord Denning MR repeated the approach which he had adopted in Parkes v Secretary of State for the Environment[1978] 1 WLR 1308 , namely that `operation' comprises activities which result in some physical alteration to the land, which has some degree of permanence to the land itself. In this way Lord Denning was able to exclude the laying out of the work with pegs from the ambit of the word `operation'. The physical removal of the hedge and the excavation of soil with a JCB removes this case from the exclusion of section 43(2)(b) even on the basis of Lord Denning's dissenting judgment. The passage from the judgment of Eveleigh LJ in the Malvern Hills case at p 70 is, in my judgment, clear authority for the proposition that the extent of the work is relevant for consideration only on a de minimis basis. `I therefore do not regard Parkes's case as authority for the proposition that there cannot be an operation within section 43 unless some physical change has already been achieved. If an oil company constructs a drilling rig for testing purposes, but the drill has not yet pierced the soil, are we to say that it is not carrying on engineering operations? This conclusion seems to me to accord with the intention of the legislature. Sections 41 and 42 seek to ensure that land will not be held undeveloped for an indefinite period of time in the hands of speculators whose only intention is to sell the land at some future propitious date at the enhanced value that development permission attracts. Section 43 seeks some earnest of intention to develop. The specified operations are not necessarily very extensive. Very little need be done to satisfy the section. That which is done, however, must genuinely be done for the purpose of carrying out the development.'"
"... the pegging out was, in my opinion, on the whole of the accepted facts an unequivocal manifestation of the intention of the builders to begin development within the permitted time..."
"It is perhaps not necessary to be dogmatic on the point in this case: but our present view is that to `win' a mineral is to make it available or accessible to be removed from the land, and to `work' a mineral is (at least initially) to remove it from its position in the land: in the present case the china clay is `won' when the overburden is taken away, and `worked' (at least initially) when the water jets remove the china clay together with its mechanically associated other substances from their position in the earth or land to a situation of suspension in water."
"It would be particularly undesirable, in our opinion, to attempt to introduce into the statutory code requirements which were not capable of reasonably precise definition. As was submitted on behalf of the second respondent, the requirement that the specified operation should be undertaken with some sort of intention in regard to the carrying out of the development would be one extremely difficult to define and apply. ... Where the developer has or may have mixed motives and purposes, the application of any tests of genuine intention becomes even more complicated. If there were any such test, it might have been expected that it would, by this time, have been clearly defined by authority. ... the statute prescribes time-limits and the circumstances in which planning permissions are to continue in force beyond those time-limits, and does so without any requirement as to intention. It seems to us therefore that to add a requirement as to intention would clearly go beyond what the statute prescribes."
"Having considered all the authorities, it is our conclusion that there is nothing in them that compels us to adopt the approach urged on us on behalf of the appellants. It is, no doubt, natural to feel that it would be unsatisfactory if the person entitled to the benefit of a planning permission could keep it in being by carrying out some work that could be regarded as a mere token or pretence. It seems to us, however, that the solution to that problem, if it is a problem, is more likely to be found by applying an objective approach and considering, first, whether what has been done has been done in accordance with the relevant planning permission, and, second, whether it is material, in the sense of not being de minimis ... In our view, as we have indicated, there is no justification in the terms or in the structure of the legislation for the imposition of an ill-defined requirement that the specified operation should be carried out with some particular intention. In our view, the proper test is an objective one..."