Looking at the website, the total number of 75s left in this country (licensed or SORN) appears to be approximately 600. Without the website, I wouldn't even be able to hazard a guess at how many there are, so I'm happy to believe the number shown. However, what I find hard to believe is the data from about 15 years ago, when the total number on British roads never reached 800 - is that really accurate? Or am I not using the website properly?
https://www.howmanyleft.co.uk/vehicle/rover_75