Transferring a stock and selling with a different broker

Sorry if this is not appropriate here, can be deleted. My current broker won’t sell my shares because of their procedures but they said there’s a possibility I can transfer to a different broker who may allow the shares to be sold. If I do this and have a capital loss will I still be able to claim this as a capital loss because I’m moving the funds through a different provider and the ticket has now changed to have a Q at the end? Based in the UK