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The Bordered Sallow larva in ukleps is very like this also but this doesnt have the lineated dotted pattern on the dorsal surface. It looks like a good match for BLBE.
Thank you - I've checked ukleps site and I see what you mean. In that case I think the LHP is probably the clincher, as this was on my tomatoes! There's no restharrow nearby that I'm aware of.
On this occasion I hadnt even thought of looking at foodplants for some reason? Sorry for not noticing that youd already supplied the relevant info.
Lat/Lng: 52.5, -1.6
OS grid ref: SP3094