No interactions present.
We've also had Small Tortoiseshell in our garden on 5th and 14th March this year. Some warm weather at last to bring out the overwintering adult butterflies.
No reason to disagree with you but without a photograph or a description I do not think it will be possible to agree the ID.
Lat/Lng: 51.426625200485, -2.7697198391616
OS grid ref: ST465700