2 mm., or thereabouts, exploring crevices on garden Maple tree.
No interactions present.
As with the recent discussions about Scarlet Elf Caps, the velvet mites are another area where there seems to be a default identification to a particular species. With this observation I would suggest a Velvet Mite - yes. Eutrombidium (Trombidium) species - yes. But going any further on the basis of the pictures is not really possible.
Lat/Lng: 50.839246983791, -0.23680071830745
OS grid ref: TQ242058