we are trying fit a new light fiting in ther kitchen?

Additionally DIYing kitchen electrics in the kitchen is not legal in the UK unless you are competent person - and it doesn't sound like you are. :-)

t
April 2008

This sounds like another classic mixed up switch line mistake.

Your coonections should look like this.

All 3 reds go together with a connector on them and taped up.

NOTHING ELSE CONNECTS TO THEM.

2 of the 3 blacks are neutral 1 is the switched live and should be marked with a red sleeve.

If you have mixed them up you need to identify the switche live.

If not the neutral of your fitting goes to the 2 blacks the live to the black with the red sleeve.

To identify the switched live is easy but you need some simple test gear........

Regards

Steve
April 2008