I'm looking for a UK server based host that can provide me with:

1) .NET framework 2.0 (a hosting provider that supports .NET 3 and eventually 3.5 would be fantastic )

2) MSSQL 2005 database

3) SSQL Server 2005 Reporting services + SSQL Server 2005 Reporting services web services

4) Support for the MS Ajax Framework

Any recommendations?

Your requirements seem pretty common, most Windows hosts pretty much support all of the new .NET releases (not including 3.5 since it's still in beta). The only thing you might run into is the reporting services.

Sorry but I don't think that most of the Windows hosting providers are still having support for .NET 3 framework as well because of control panel limitations.

MS-SQL 2005 reporting services will be costing your extra.. but you can get rest of the services with every reliable host. Even .NET 3.0 is available with most of the hosting providers.

Good luck!