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Temp needle goes onto red.
The problem is that the car is not overheating. Changed temp switch and clocks.
Still same problem.
Need to fix before gaydon

Usually its the sender. Did you check if the thermostat opens?

Tried still all the same.
The gauge is all over the place . It sways all over the place

Well in that case at least ur sure its an electrical issue... wiring loom issue if you replaced the sender at the start and the gauge at the end

I had this problem too, temp needle dancing all over the place. Turned out the earth cable ( - cable) to the battery came loose and just needed to be tightened again. Hope yours is just as easy to fix

Got it fixed I hope
Turn out to be bad / old wiring

sorted

Seems when ever Gaydon comes around the car seem to get very temperamental on me

Was a good run to gaydon.
Car run with no problems.