stop press *** Car fails again

My car - I love her, but all cars are a pain in the arse when they don't perform - has failed the MOT emission test yet again. Also, one headlight is no good :(

*HOWL*

I was advised that I had to 'take the car for a burn up and then arrive at the testing station'. I did, and alas, no good. Now I need to get a 'lambda unit' along with a 22mm spanner. The Lambda unit attaches to the exhaust pipe and then the engine, and does something useful, no doubt.

So. Re-test on monday. Whoopsy doo.