Marina,
I am going through the relocating process now, well before May, do you
think I could be still sued for copyright violation?
I'm not a lawyer, and I specifically don't know UK or EU law, but I think it is very unlikely.
More likely a copyright claim would be aimed at the web site displaying the material, Groups.io. Under US law there is a safe harbor provision which prevents such claims from being taken to court as long as the web site follows a set procedure for administering the claim.
For the copyright owner that procedure is onerous enough to discourage most people from making the claim unless the work in question has commercial value.
If the copyright owner does file the claim your personal downside risk is that Groups.io removes the claimed content. No lawyers involved unless you decide to counter-claim; then the copyright owner must file suit or go home.
Shal
Shal Farley