I’ve put the old MAF back in. I also sprayed the MAF with electrical contact cleaner before putting it back on the car.
Idle is good, no power loss issues but engine light still came on after about 5 miles :/
Getting kinda fed up with this now.
Went to a few scrappies today to get a used MAF sensor but they all refused to sell me one individually, stating that I would have to buy the full throttle body.
Next step is to buy a full throttle body from scrappy or eBay for £40ish, just for the MAF sensor unfortunately.
Update - have managed to get a throttle body for £30.
Going to try to sell it on once I’ve taken the MAF off it (but obviously make it clear that I’ve removed MAF from it)