And don't forget it'll probably cost you at least 2 grand to fit, and £200 a year to run, irrespective of hours flown - even in gliders/microlights worth a total of 2 grand!
The parallels with the government ID card scheme are fascinating - unknown technology (well for battery powered Mode S), very dubious benefits (if any) and undefined but rapidly rising costs - but the hapless taxpayer (GA pilots in this case) will pick up the tab
- oh and total "gold plating" compared with anything Europe may propose.
Try writing to your MP and draw his attention to the similarities (unless your MP is named T Blair of course (or you work for an avionica manufacturer)