i had the following email sent to me last last night on this very subject. i've checked mine out.
Date: Monday, 1 March, 2009, 11:49 PM
Speed Cameras
Thought you might be interested to know that following the UK
Government's freedom of information act you can now get access to ALL
speed camera offences registered in the last 12 months.
Did you know that every time your car goes past a speed camera,even 1mph
over the set limit, it is registered and put on a database? You only get
a ticket if you are way over the limit or, (this is the bit that I
didn't know) if you receive over 10 near misses, you will be classed as
a serial offender and get a ticket the next time you go just over the
limit.
This is why you hear of people being done for 34mph in a 30mph limit
area, whilst others doing 39 do not. You can check what has been
registered against your vehicle at the following web address:
http://www.i-database.co.uk
You will be asked for a password, but just click on the need a Password
link and you will be given one for future use. Or just enter your car
registration.
If there is any data on your vehicle you can click on the camera window
to see a copy of the photograph.
Hope it's useful.