Right, sierrafery - I cannot thank you enough for the clear instructions and help with this. ;):)

Fuse good and applying 12v to blue/red does indeed allow relay to click and fan work as it should on all settings.

Does the ignition load relay serve anything else as not noticed other failures? And can you tell me the location or if not important can I just borrow another ignition switched 12v supply to serve the blower motor relay?
Yes it does, only one over function apart the heating system, the electric windows system, the relay can be located in the drivers footwell…I believe as I’ve never looked, if not then its on the other side, fuse 15 looks after the 12v supply to the relay coil.
Colour of wires involved to and on from the fuse to the relay should be shown in the link from sierrafery above.
 
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