Yes it is the switch as I have been unplugging to get them to go off, but I can't understand why the switch is keeping them on, as originally I relised the switch is culprit thats why I brought a new one and it's doing same thing and is why I asked in original post is there an easy way to find out which stat is installed without removing it?

The switch is the standard Ford switch so 88 degrees it closes, I brought this over the uprated one as I have standard radiator. The anti freeze is halfords own I changed with (Pink).

The gauge when car is up to temp is just above the m on the gauge and fans activate around the r mark I think and then wont go off again.

Only thing I can think it may be to do with stat?

Martin.