This will require you to have a spare DSL router as we will be turning the Thomson router into just a modem by using "bridging". You will also need your static IP, subnet mask, gateway IP and DNS server IP addresses which Be should have sent you in your welcome email.
Plug your spare router into one of the ethernet ports on the back of the bebox.
Login to your bebox
Click "Thomson Gateway"
Click "Configuration"
Click "Setup"
Click "Next"
Select "Bridge", Click "Next"
When asked, add your IP and DNS info.
Reboot router, it may do this automatically
Your "spare" router is now your actual router, plug the rest of your computers/network into it instead of the bebox.
Your VPN should now work.
If anyone else has a better solution than this, please drop something in the comments box below.