I was trying to ignore Roffa's comments on the grounds he seems to have little perception of what it is like for a private pilot to instal this equipment, and the fact this forum is entitled PRIVATE (not commercial) flying. Sure I recognise the benefits for controlling IFR traffic in controlled airspace, but unless NATS reduces its charges to 'pipe' SSR information to smaller ATC units, especially those providing LARS, it will have absolutely no benefit for those ATC units and hence the users - PRIVATE pilots - will have spent all that money for no benefit to themselves either.