Multicoloured Spiky Beetle?

Multicoloured Spiky Beetle?

Observation - Multicoloured Spiky Beetle?. Description: Black and orange spiky beetle(?) found on a bus in Cheltenham, Gloucestershire. Looks to be wingless. Approx. 1cm. What do you think it is?

Black and orange spiky beetle(?) found on a bus in Cheltenham, Gloucestershire. Looks to be wingless. Approx. 1cm. What do you think it is?