In article ,
"Novice DIY'er" writes:
Thanks for al the replies. Will act upon the replies. I have a question
though, what does it mean when you say an appliance is 'double insulated'? I
have a feeling the light I 'fitted' in the other room was this since there
were only two cables and it works!

It means it was designed to be safe with no earth connection.
There are always two layers of insulation between live parts
and anything you could touch. There will be a symbol on it
somewhere with two squares, one inside the other, and no
provision for connecting an earth.

--
Andrew Gabriel