I would suggest your solicitor friend doesn't have a good understanding of contract law if that is what they are advising you @Nina497
If a worldwide pandemic on the scale of we haven't seen in our lifetime is not a reason for having an EC policy to cover the pandemic I don't know what is.
Did you show them the original EC policy with a term that covers pandemics?
On what legal basis did they say you would have a case in the small claims court?