It was a place in Warwick but I was under the impressions that on a permanent 4x4 like a defender (different for a series vehicle) you should use a decelerometer for the brake test rather than the rollers to prevent diff wind up. I know there is an argument that for the short duration the rollers are fine and will not be an issue, but I thought by the book their method of testing was correct, it was just the way they carried out the test (hard acceleration at high revs, and then lock up and slide across the carpark) and then repeat it more times than I believed was necessary. My objection to the whole experience was the complete lack of mechanical sympathy for a vehicle that at the time was 25 years old and had just had some very expensive new parts fitted that I did not appreciate being treated like that.
I now use a little independent village garage in Pillerton which I cannot recommend enough. Not the cheapest but it is a fair MOT, and most importantly they are used to vintage cars and old to land rovers. They have a 6 cylinder 109 with a Harvey Frost recovery crane parked at the back of the shop that used to be the garage recovery truck until the regulations change. Every time I go for an mot and ask it is not for sale although last time I went it has £3000 finger written in the dust on the side window, but it would need a lot of work as has been parked up unused since the regulations outlawed recovery with the crane.