Seems like a hosting error; the whois info is correct and the registration hasn't expired.
The Vauxhall Practice
PIPEX Communications Hosting Ltd t/a 123-Reg.co.uk [Tag = 123-REG]
URL: click here
Registered on: 20-Apr-2005
Renewal date: 20-Apr-2007
Registered until renewal date.
WHOIS lookup made at 16:38:03 08-May-2006