Feeding galleries of elm bark beetle. Not sure if there is more than one species in Britain???If so can you tell which by these?
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There are some pointers to the 2 species here:
The key feature seems to be the length of the main gallery.
Thank you for the link. I have gone back to measure the galleries. The longest main gallery is 4cm long, most being about 2cm. The branches from these galleries are mostly 4cm, but the longest being 5cm.
I am guessing that this may be small elm bark beetle?
Lat/Lng: 51.2, -1.5
OS grid ref: SU3546