Well, Shazzie, it all depends if tou are a properly licenced blonde.
I ignored the link, and set out to find the criteria for myself. The details on the Sheffield Hallamshire Hospital page sent me to the US Government page relating to Dr Burt’s trials at Northwestern U in Chicago. The first thing that leapt out at me was a blunt statement that the maximum EDSS score was 6.0. This means that if you need two sticks (or crutches) to walk, or are in a wheelchair. you would be excluded.
My guess is that they only want experimental subjects where there is a good chance of being able to produce a good result, so the guy who was hit really hard was accepted even though he was in a w-chair. Reminds me of when I worked for a Government Agency where the “Ethics Committee” reviewed each experimental proposal - the main criterion was whether the statistical test(s) proposed would produce a significant result. A strong case of “Will the results make us look good?”.
Regardless of how they apply the criteria, it does look like a most excellent treatment, so if your MS is recent and aggressive and you have already tried a DMD, and your consultant will refer you, then it could be worthwhile considering. It is definitely out for me: too old by 13 years, SPMS, so there are two NOs for a start.