SysAdminMan provides UK based Asterisk/FreePBX Virtual Private Servers

• A virtual server running popular open source PBX software
• Based in a secure and resilient data centre with backup power, network and air handling
• From only £20/month with no long term commitment or setup costs
• Ideal for small businesses wanting a reliable PBX without up front hardware costs
• SysAdminMan has been providing hosted Asterisk servers since Feb 2009

You can choose from Trixbox, Elastix, PBX-in-a-Flash or a custom built Asterisk / FreePBX / A2Billing installation

See here for details - http://sysadminman.net/