Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
Was any gain made on the sale of those shares?
Yes it does, as there was no gain there is no requirement to make any declaration to HMRC.
Just forget about it, but keep the paper work just in case.
I do hope that I have put your mind at rest on this matter.
Just confirm that you do not have a Swiss Investment account. HMRC do tend to pick up the wildest assumptions, invariably incorrect and always in the Revenue's favour.
Thank you for your support.