So I took it for a blast with the O2 sensor unplugged and it ran better that when it first started playing up but still missing and stuttering a bit.
I decided to do a bit more elimination of other faults and when I unplugged the coolant temp sensor it ran great. Started first go and had no miss under load. Still had a slight hesitation every now and then but nothing compared to what it was like before. I assume the base map when the coolant temp sensor is not detected is pretty rich so I think that could be the source of the hesitation.
Now just to replace that and get it home on Sunday!
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