DIYbanter - planning enforcement 4 years rule and satellite dishes

Due to some ****e stirring form someone, we don't know who yet, my
next door neighbour got a letter from our local planning department,
telling her she hasn't got planning permission for her satellite
dish. Now the dish has been up for years she can't quite remember
but she had Sky analogue and switched to digital in 2000, so its years.

Now from my limited understanding of the Town and Country Planning
Act 1990, a council is time bared from taking enforcement action after
4 years, now is this the case in respects of the erection of a
satellite dish?

"Time Limits- Under Section 171B of the Town and Country Planning Act
1990 enforcement action may only be taken within specified time
periods. Usually, where there has been a breach of planning control
consisting of the carrying out without planning permission of building,

engineering, mining or other operations in, on, over or under land, no
enforcement action may be taken after the end of four years from the
date on which operations were substantially completed. Where a breach
of planning control consists of the change of use of any building to
use as a single dwelling house, no enforcement action may be taken
after a period of four years from the date of the breach. In the case
of other breaches (with the exception of works to a Listed Building
where there is no time limit for enforcement action) no enforcement
action may be taken after the end of the period of ten years from the
date of the breach."