"John F Kappler" wrote in message
...

There is also a shop south of Heathrow (3M?)
where you can see the various systems.....

More details would be appreciated!

(Are you saying it's run by 3M, or that it's 3 miles south of Heathrow?

--
John Rowland - Spamtrapped
Transport Plans for the London Area, updated 2001
http://www.geocities.com/Athens/Acro...69/tpftla.html
A man's vehicle is a symbol of his manhood.
That's why my vehicle's the Piccadilly Line -
It's the size of a county and it comes every two and a half minutes