Rove Beetles are another large family of beetles (around 1,000 species). Many are very tiny, but some, such as the more famous Devil's Coach Horse can be quite large - several centimetres in length. They generally have short wing cases (elytra) and many are black and red.

This one is possibly Philonthus politus - black, with bronze tinted elytra. It was found in the walled garden.