I live within about 2NM of the BNN VOR, south west of the beacon in Chesham. While sitting in the backyard yesterday (with friends, nice BBQ, lovely blue skies) I noticed that there was quite a high number of both GA aircraft (mostly PA28, C172 and similar) as well as, more unusually I suppose, quite a lot of microlights (was there a rally somewhere?). For a while there, mid-afternoon and early evening, I reckon there must have been about two aircraft passing within earshot about every 10 minutes.
I suppose therefore that there is a markedly risk of higher on blue-sky Saturdays and Sundays like this anywhere near the beacon, and generally at high-traffic "pinch points" such as this around the LTMA where large numbers of aircraft OCA must route within a confined space below the 2,500' altitude lower-limit and the generally 500~1000' terrain.
Be careful out there - especially on "nice" days!
Andy
p.s.
stillin1: it can be difficult to get a radar service in these conditions, for a couple of reasons:
1) not within usual service area of Brize, Farnborough etc.
2) Luton don't do LARS in my experience
3) On sunny Sundays like this, Brize etc. quickly reach saturation and can't provide a service anyway.