Shieldbug [Coreus marginatus?]

Shieldbug [Coreus marginatus?]

Observation - Shieldbug [Coreus marginatus?] - UK and Ireland. Description: The awkward shape of this shieldbug should make it easy to identify. Again my limited resources make it difficult and the nearest I can get is C marginatus but it does not seem to fully fit somehow.

The awkward shape of this shieldbug should make it easy to identify. Again my limited resources make it difficult and the nearest I can get is C marginatus but it does not seem to fully fit somehow.