.... so since our communal aerial went phut, I've been messing about with
aerial positioning to get the best signal (we're in a valley) and
cursing Mr Plod as tetra-type interference pops up on the screen every
evening. Today I was trying to work out what was wrong with my son's
computer, and suddenly SWMBO calls up that the interference has just
come on - did you just turn anything on?

We had.

The landing light.

It appears the OSRAM CFL is shoving out significant quantities of
broadband RF!

Never heard of a tungsten filament doing that...

Andy