Mot failed on emissions (lambda reading 0.000) They said it wasnt picking up the lambda reading. Garage is useless and havent gave me amn answer to how to fix it to pass.anybody have any ideas

Sounds like their machine is broken.

Id take it to another garage? and get my money back once its passed

Impossible to have lambda reading of 0.000 so their machine is either broke or their sensor is duff/not plugged in.

Go elsewhere and demand money back as jimdiesel advises.

Out of curiosity which garage?