it is the new cable that is earthed in the switch box.
I have the following connected to the light fitting:
brown, blue and the earth connected to the earth point on the fitting.
the earth sleeving contains two black wires looped. found it that way?
only earth I can see is the one that is bare.
Will have a route around in the space but not very big
thank you all for your help so far.
I am going to take some pictures of the wires and fitting etc and post them on here if possible.
That way you will all be able to see what I am trying to describe (Poorly).
this would of been my first step had i got there before the lovely Mrs Pots!
There is no black wire in the cable including the blue, brown and earth. two blacks are separate and looped - feed back to the switch (double switch) one for bedroom other for ensuite, 2 reds also looped