Thanks Charlie,
Bridged the fan switch today and fan runs no problem.
Radiator was flushed when out of car and checked coolant was clean today
as there was a puddle under the car..alternator fan had punctured the Samco silicone hose so had to drain it all.
Luckily the main radiator hose is the only original I had left so that's on now.
Not refilling till a new thermostat and fan switch arrive.
Doubt very much if I'll bother replacing the Samco thing at a 196 quid +vat.
Was never impressed with the fit and the 3 hoses cobbled together.