Glyder Fawr?
No trig point there
Is it a trig point? It's not your standard concrete jobby.
(which excludes High Street and Skiddaw)
I'd guess it's somewhere in the Lakes though. We know it's closer to Helvellyn than to Ben Nevis, which excludes the Highlands, not in Wales, and the rocks and background hills are wrong for the Pennines or southern Scotland.
Assuming it is a trig point, and excluding places like ScaFell Pike that don't have a big enough flattish area at the top, and places that look low enough to be mostly grassy, I'll guess
High Raise (the one near Sergeant Man, not the one just along from High Street