Just a bit more on Security vetting and checks.
I discovered a while ago that under the Data Protection Act everyone is entitled to see what information is held about them on the Police Computers. This is called a "Subject Access Request".
You have to fill in a form, provide various items of proof of identity, etc and 21 days later a letter comes back detailing the information the Police hold on you. Out of interest I applied for my records just before Christmas. "Nothing Known" was the reply.
The Police can (and do!) make a charge of £10 for providing this information. Anyone who wants to see their record can use the link below to access the Police Website at the appropriate page.