A radar service is only as good as the resource available outside controlled airspace.
I am not confident in the ability of the present system to cope with a large number of extra transponder equipped traffic, if the CAA have their way.
Our regulatory authority is determined that Mode S is the way to go, but has signally failed to answer (or refused to answer) many relevant technical questions.
Much of the rest of the world has recognised that ADS-B is a much more sensible, forward looking system.
FLARM works in large areas of Continental Europe for gliders and powered aircraft, and is affordable.
It seems extraordinary that a common system is only acceptable if it's yours.