Bw, I did not know - or had forgotten if I have seen it before - that the LAST is a EUROCAE standard ED-115; what does it mean - that a 20w or 30w LAST can now legally be used in Europe generally, and specifically in the UK? If not, what other steps does a regulation/specification/standard have to go through to enable people to voluntarily fit it (always assuming they can solve the certification and installation issues)? (I'm still trying to learn about these things.)
By the way, AIUI, Flarm is a de facto standard for gliders flying in the Alps, in certain competitions in some parts of the world, and there is an increasing take up elsewhere. I have not heard of any other approaches having anything like that take up rate.
Chris N