Having been on 10m JT65 all morning, nothing has been spotted so far. I shall go and check sync to internet time.
UPDATE 1308z: Time sync is fine. Still no spots on 10m JT65.
UPDATE 1445z: Still all quiet on 10m JT65. With people going back to work after the Christmas break, I expect there are even fewer people active now on 10m JT65.
UPDATE 1724z: Just G4CJC (73km) in north London spotted a few minutes ago on 10m JT65. A disappointing day.