Insect with interesting pattern

Insect with interesting pattern

Observation - Insect with interesting pattern - UK and Ireland. Description: Insect about 2.5cm long (excluding antennae. Diamond pattern on wing-cases(?)and thickened section on hind legs. Found on pavement outside my front gate. Showed orange on body when it flicked its wings.

Insect about 2.5cm long (excluding antennae. Diamond pattern on wing-cases(?)and thickened section on hind legs. Found on pavement outside my front gate. Showed orange on body when it flicked its wings.