I did some searching, as above, (name removed) was/is listed as the UK registrant on an old (Who-Is link removed), and a person who owns the site linked below lives in a place called, (Town name removed), that place is also mentioned on the archived maths site, so a possibility it's the same person on this contact page:
(Link removed)
That site is also hosted by Krystal and on the 1AND1 registrar tag, same as the maths name.
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It may just be a coincidence with (Town name removed) place, how I found the link above was, on the maths site there's a link to (site removed), I checked the backlinks for that domain and got the (site removed) link above. May be the person you need, or as they are/were in the same town, may know of them.
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Personal details removed.