Tonight all GB.COM domains have been pulled so if you have a GB.COM domain you need to check your registration details and ensure you still own the domain name.
If you get the message:-
Welcome to the GB.com site
You may be here because you have been sold a domain or email service susing the gb.com domain that has ceased to work.
You can restore that service swiftly by registering with GB.COM Ltd.
GB.COM Ltd will not provide a service that you paid other for, unless they have an arrangement with GB.COM Ltd.
If you have already paid for future service and it has ceased then you should contact your supplier.