My 2006 Agila was making an awful noise from the exhaust. Took it to my nearest National Tyres. They jacked it up, looked at the exhaust and said the bolts holding the exhaust to the engine were corroded. The mechanic said I needed a complete new exhaust? There was nothing wrong with the exhaust it was the bolts. They said It had to be a complete exhaust. The mechanic then phoned round to find the exhaust but could only find the back part but then found the front part from another place but delivery would take 48 hours. If it came in two parts why did i need the whole exhaust? He then said it would cost £248 (after 20% off) I asked him if he could do a temporary repair till the parts came in, he said no. Five minutes later I drove into another garage nearby. There a mechanic replaced the bolts for free. It took him ten minutes. I then looked on line for the exhaust parts for my car. The average price was around £70 for the complete exhaust. As National told me it would take less than an hour to replace the exhaust that meant an hours labour would have cost me £178. The moral of the story is...dont use National!!