Given the location I wonder if this was out of Conington?
I'm based at Conington and have spoken to one of the instructors in the last 24 hours, no mention has been made of the crash, so I don't think its anything out of there.
There is a very active glider site behind my house, on the site of RAF Upwood, but I can't imagine they'd have been even contemplating flying in those conditions.
Bit of a mystery it seems!