It is correct, if you look at the postcode on google you will see 7 parking bays, the distance is from the start of parking bays all the way to examiner parking bays, which is about 10 parking bays, dvsa guidance on website says 8 parking bays is about 20 metres, also the google earth measurement can be calibrated against the HGV reversing area which is marked out in metres and it is bang on. I am good up to just under 30 metres without glasses but someone who meets the legal requirement at say 22 metres but after that they don't, are going to fail because they will be stood at 25 metres.
If my daughter fails the test when she does it then yes I will, I just took her to the test centre to have look at the layout of the road.