The GPS/PLB/PCAS all cost a fair amount of money but now I have them the investment is over.
Following on from Peters comments it was a breeze flying up to Scotland recently between 4 and 6 thousand feet, the only two aircraft I was told about by ATC were a Airbus A319 and a Fokker going into Newcastle.
The rest of the aircraft I saw all looked lke they were skimming the fields below.
I realise it is not always possible to fly at such levels due to airspace but I always try and get as high as poss.