I always remember meeting Mikhail Khodorkovsky in the ultra-posh Hyde Park Hotel in London.

It was partly the Russian oligarch’s sharp wit, his substantial physical presence and what appeared to be his surprising openness.

But the real thing that stuck in my mind was quite trivial: his spokesman telling me that if I was coming straight from playing football (as I was, it being a Saturday morning) I must take my muddy boots off before I entered the lobby of the hotel.

Within