I was at Full Sutton at the time and took the call on the landline from Linton. They said he had trouble with glare and wanted to get him to us. He had called a pan then downgraded it himself. He flew twice through our overhead at 1000-1500 ft from the W and again from the SE and could not see us . He was straight level, in cruise, no flaps, good viz. He never switched to our A/G, very wise 'cos it was only me there.
Chap from Linton on the phone sounded like they did this sort of thing every day.
Excellent job all round, hope he recovers fully.