purchased industrial site.
to carry on operations of similar nature to those site had previously been used
officer had written letter which plaintiff alleged accepted it could carry on
business without need for planning permission.
on renovating factory began.
permission subsequently refused.
claimed inter alia statements of planning officer estopped council from
refusing planning permission.
of Appeal rejected this argument.
officer could not do what legislation required Council to do.
representation by officer could inhibit discharge of those statutory duties.