On bramble along a woodland ride.
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I am beginning to worry about my ID here - i think I was wrong.
I think this may be Criorhina berberina, with all long hairs around abdomen rather than a specific tuft at the sides, which I think I mistook. Another feature is that the antennae are red-brown in this insect rather than dark, as they should be in floccosa.
Bother! Sorry folks!
Another step on the learning curve!
No, I think you were correct with floccosa. It clearly shows the tufts of pale hairs at the corner of tergite 2 and, importantly, the hairs on the tergites are sparse, such that you can easily see the surface through them. On berberina, the hairs are thick on the tergites and you cannot se the surface through them. Antennae colour is not that important, as far as I know.
My Flickr photos...
Umm, looking at as many googled images as possible I think I can see a correlation between a real tuft much longer than the other hairs on the abdomen (these others should be shorter in floccosa I believe) and the darker antennae. In berberina all the abdominal hairs are quite long and maybe where the top ones might wear (flower visiting, exploring holes in rotten tree trunks??) the hairs under the wing junction may be retained rather more to appear as a tuft - but should not be longer than the other abdominal hairs, and in most images the antennae in such insects are reddish as suggested for berberina in one thread of the dipterists forum, and a couple of other forums.
Also I think I may have chosen misleading photos as I thought it was floccosa.
However I am only a rank beginner and I know I have a huge amount to learn!
Lat/Lng: 51.237, 0.2914
OS grid ref: TQ600511