A strange looking 'ant' running around on an ant's nest in the garden turned out to be a ant-mimicking bug nymph.
No interactions present.
First antennal segment appears to be too long
for a Damsel Bug.
Thanks for the alternative, I have no literature at all on bugs so was relying on www.britishbugs.org.uk which does not appear to feature this species.
Myrmecoris gracilis shows in their list if put into search, gives alternative names too.
Please add the tag "Ant mimic"
Lat/Lng: 50.8, -1.1
OS grid ref: SU6808