Yes I understand what NAT is now many thanks.
It says at the bottom of that link:
"Communication might be restricted depending on the security functions provided by your Router or Internet service provider"
Is PlusNet known to have problems with consoles when it comes to online gaming. I know that xbox had problems with talktalk when it came to online gaming.
Ok where do I go in my router to enter these ports?:
•TCP: 80, 443, 3478, 3479, 3480
•UDP: 3478, 3479