I was wondering if anyone could recommend a list of UK hosting companies that specialise in larger contracts. We are talking dedicated clustered web services and databases, secure VPN dedicated p2p lines and ISDN, custom SLA contracts etc.

We have looked through a number of hosts already and are continuing the search for best service and support infrastructures.

No US hosts please. The gear has already been built and just needs locating and supporting within the UK.

Thanks for your help.