Well the fan is now working!
I picked the car up this morning and had a chat with the service manager.
He told me that access to the fan is incredibly difficult on the LHD Evoque as it is within the bulkhead and can only be got to after removing the small access cover on the left hand side of the engine bay, reaching in back towards the centre of the vehicle and then through a small hole in the bulkhead, even then the fan is still lower down as it is in the RHD model.
Replacing the whole unit is a huge undertaking and would only be considered as a last resort so their normal approach to rectifying the problem is to free and then lubricate the fan in situ.
He said that they very rarely have to do this more than once on any of the Evoque‘s that come in with the same problem.
Reassuringly, he said that he’d checked the vehicles history, (They sold the vehicle to the original owner and have serviced it ever since) and no problems have ever been reported with the fan, so if I get another 3 years trouble free I’ll be quiet content.
The lockdowns over here have been incredibly strict and so the Evoque has been sat idle for sometimes weeks on end whilst we’ve been using our other car as a runaround, perhaps the moral of the story is to fire it up every couple of days and run the fan and other systems to be on the safe side.
As an aside, they tested the battery and as I suspected it wasn’t keeping a charge so they replaced it. An eye watering €325!
Still, everything is now running as it should and it was an absolute joy to open it up on the Autoroute and the country lanes back home.