Never seen this one before.
Third rock from the sun
It looks like a brown shield bug KeenOnGreen.
Cacoethes: An irresistible urge to do something inadvisable
The north west of south east Wales
The 80s shoulder pads make me think it's a dock bug. There's a couple of similar looking ones though.
Thanks, I’ll go and do some research. Time methinks to buy a book on British insects. Any good recommendations gratefully received.