The basic requirement remains, to fly a glider solo in the UK you have to
be aged 16 years or more. That is the ONLY legal requirement, there are no
others, no medical, no certificate, no licence, no talking to jobsworth.
You just need to be 16 years or older.

Without wishing to accuse you of being a jobsworth, Don, I think it's been 14 in the UK for a few years.

Paul