“It is necessary to look at the actual circumstances to see if construction has in fact been completed. In the present case we are concerned with whether the garages were constructed at the same time as the dwellings: in other words had the dwellings in fact been completed before the garages were begun?” … “We also agree with the contention that the construction of the dwellings was completed when the planning permission had been fulfilled...”
“Where, a service falling within the description in items 2 or 3 is supplied in part in relation to the construction or conversion of the building, and in part for other purposes, an apportionment may be made to determine the extent to which the supply is to be treated as falling within item 2 or item 3.”