New pack arrived yesterday & I fitted it last night, one of the simplest jobs I've done a car, done in 5 min!
Now the fan is fixed at low speed I noticed the when spinning up there is a slight squeak & the fan is quite noisy as if a bearing in the motor might be worn which could possibly explain the coil burning out. Think I'll pick up a new fan motor after Christmas.
Looking at the receipts I got with the car I saw that the last owner paid a garage ?47.50 + VAT to have the resistor pack repaired!
Thanks again for the help.