At the moment I am again on 70.154 MHz FT8 with my big-wheel 2m omni and coax tuned via the auto-ATU in the FT-710. At 1029z, no spots. I have yet to be spotted on 4m, although my "antenna" does not help!
UPDATE 1226z: Well, my 4m "antenna" is working with 3 stations spotted and one spotting me - G4HGI (244km).
UPDATE 1241z: I would imagine that most propagation is one of the following: flat-band propagation, tropo enhancement, MS or scatter. As Bas says in the comments, the Es season is probably some months away still.
UPDATE 1515z: G3SHK (200km) has been spotted, and has spotted me, on 4m FT8 (see map). M0RJV (91km) has spotted me. Still to have my first FT8 QSO on 4m. The impression I am left with is this band is very under-used apart from (maybe?) during the Es season.