Have just recently shifted into own home. When we moved in, we had no TV reception at all. So gave one of the aerial installers a call so he came round and noted that the wiring was a bit dodgy, and the aerial was old. 

So he installed a new aerial (looks similar to this: http://www.pbtech.co.nz/index.php?z=p&p=TVNATP0958 - not one I have ever seen before), and redid the wiring to the jack point in the wall.

Our reception during the day has been great since then, but when night rolls in, the reception drops off so the picture is very pixelated, there are audio delays, and so on. We persevered for a month, then finally got sick of it and called him back recently.

His reply to us was that either we have dodgy electrical wiring in the house, or there is a street light within 50m of this house that is not turning on correctly. We're like "what??"

Is this true? We took note of the TV tonight and what time it started to go funny. Happened at 9.15pm, so we are going to monitor it for a few more nights.

No extra circuits were turned on between when the TV was fine and when the reception became pixelated... so we are guessing it is not this house wiring.

We have noted that there is a dodgy street light within 30m of the aerial though. Not sure if this really is true but we called the council anyway..

Are we being told a whopper, or is there really some credibility on the street light thing?

Incidentally, the Freeview website tells us we can get all Freeview services in this area with no hassles.