S'funny you should mention this.
A while ago I had a cold call from a company telling me that the free loft insulation top-up that I'd had installed years ago was causing damp problems in some properties. Their story was that the contractors employed by British Gas hadn't installed it properly and they were offering a free 'damp survey'.
After politely telling them to go away I looked up their caller-id and it was a company in Southampton flogging the stuff they spray on the underside of the roof tiles.
They knew my name and that I'd had the extra insulation installed by British Gas and not one of the other suppliers doing the same.
I emailed Trading Standards but never got a reply.
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