I rang the place that MOT'd it and they confirmed the work had been done before it was resubmitted - "Welded" he said.
Meantime had had a water leak problem (see my other thread). That cost £80 plus VAT to fix.
Then hours later started getting strange noises from the exhaust. Took it in to today to a more reputable garage to be looked at and they say it needs a new "back box" (there's all like fur coming out the exhaust now!) and preferably also a middle section - total cost incl VAT and labour £145.
They also looked at the "welding" mentioned earlier, and said it hadn't been welded but "filled with something".
Also, a strange noise coming from the rear was because the rear offside tyre has the tread running in the wrong direction (the tread on that one is almost illegal anyway).
£800 this car cost last week - is it looking like a bit of a turkey?!