At 18:42 15 October 2013, Pam Howarth wrote:

(snip)
Real wind information is available (Butterfly Vario, Clearnav etc) and I
think it is valuable but it comes with a multi thousand Euro price tag so
upgrading my "old" (and perhaps not very reliable) technology is not an
option.
(/snip)

I haven't looked at Butterfly pricing, but the Clearnav vario (with instant
accurate wind and nav to home base) is only multi thousand Euro if the
multiplication factor is less than one. And (by user reports) is the best
vario on the market bar none.