Having trouble with the speedo reading for SVA, It reads correctly on the road, but not on the SVA rollers,

They want me to get an letter from a local garage, confirming the speeds against Sat nav, has anyone had to do this in the past, and an ideas who will do it for me ?

Get this letter sorted and they will send me a MAC,

Cheers
Scooby

Why dont you just drive by a speed camera at 5mph above the limit then the law will tell you what speed you were doing. Dont forget to take an interior shot of your speedo at the same time. The letter will cost £60 and 3 points though

I had the same issue as my speedo read off the front wheel and it was one of my fail issues. I considered the sat nav thing but he told me I need proof of reading at 30 / 50 / 70. I couldnt imagine where you would get someone to drive a none reg car at those speeds to test it so I moved the speedo pickup instead. - cant you do this?( if thats the issue?)