"John" wrote in message
...

I noticed on the engineering poster at Moorgate
that the multi coloured screws have a left hand
thread - anyone else noticed?

The old light bulbs that they had (have?) in Routemasters had left hand
threads - this was to stop anyone pinching them to use them at home.

--
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