Found when replacing garden fencing. No idea what food plant might have been.
No interactions present.
I've checked old Lady on UKMoths and the caterpillar shown there is an exact match.
I'm afraid I only managed side views as it was keeping close to the fence panel.
Interestingly, I've never recorded this species when MV trapping. It is apparently not readily attracted to light.
Thanks for your help, Douglas
In case it helps I've added a sequence of Old Lady larva here http://www.ispot.org.uk/node/268363
Lat/Lng: 53.613213, -2.447618
OS grid ref: SD704130