Front fan is fubar. Initially, it would spin backwards, but would immediately seize within 5 degrees when rotated by hand the correct way. Measuring resistance whilst slowly rotating the wrong way, it would go from less than 1 ohm to open circuit. Freed it up to it will rotate in either direction, but now won't spin in either direction under power

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Trouble is, rear fan (suck?) is reporting the same fault codes, but spins fine with 12v applied to it. So possibly still a cooling module fault.
Front fan clips into the A/C Condenser at the bottom, and is held on with nuts onto studs on the condenser at the top. Upon removal, the bottom of the condenser came off with the fan, with definite signs of yellow dye in that area, so that confirms where the A/C leak was

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If a replacement front fan cures the issue, I might just buy a new condenser for about £55. I might even put some gas in it as well.