Hello, I hope I can offer you some assistance.
Do you have the emission figures that failed the MOT? If not do you know if it was the CO, HC or Lambda?
Let me know and I'll reply as soon as I can.
HI. Car has since been put back on test and a code has come up to show oxygen sensor. There are 2 which are going to be renewed hope that fixit. IF not i will get back to you with emissions figures. many thanks