Some additional information:
I phoned my ISP and they confirmed the ports should not be blocked.
I do use a VPN which it occured to me may be the problem. I do not have time to try it now, but at some stage will disable it and check.
I phoned my ISP and they confirmed the ports should not be blocked.
I do use a VPN which it occured to me may be the problem. I do not have time to try it now, but at some stage will disable it and check.