A Large White caterpillar? ID help please

A Large White caterpillar? ID help please

Observation - A Large White caterpillar? ID help please - UK and Ireland. Description: I thought this might be a Large White caterpillar but the black spots look too solid. Spotted next to a field of rape but not actually on a rape plant.

I thought this might be a Large White caterpillar but the black spots look too solid. Spotted next to a field of rape but not actually on a rape plant.