About 4mm long
No interactions present.
Thanks Chris - indeed a striking looking thing close up!
Alan Brampton (Benson)
This does seem to be the time it's most commonly seen - it may be entering buildings looking to hibernate (they are sometimes found overwintering on conifers, like quite a few leafhoppers).
Lat/Lng: 51.6246, -1.1046
OS grid ref: SU620921
On the front door this lunchtime - perhaps from adjacent honeysuckle.