PaulUK,
Which area are you in, friend? In Croydon I can go from 255 (yes, above our limit) to 214 (yes, below our limit) in 30 minutes! I've got recordings of this (done with 3 separate instruments - just to be sure to be sure). Count yourself exceedingly fortunate! (but, then again, at 245 average, you must be spending a lot on light bulbs!).
M.
