[DrAwesome]

There is also a charge if you upgrade or downgrade your service.. so choose carefully if you decide to make the switch

You'll need to pay the service regrade fee that PIPEX are charged by BT (£35 + VAT) so it's worth considering carefully whether you will need the service before you sign up.
Other changes of service are likely to require a full cease and reprovide. At present, the £35 + VAT charge only applies to the following PIPEX Xtreme service regrades: Solo/Solo2Go 500 to Solo 1000... Solo/Solo2Go 500 to Home Office 1000 and Home Office 500 to Home Office 1000