I’m sure award winning producer Sam Mendes has no idea that homeless people recruited as extras for his latest film are being way paid below the going rate.

The film makers probably think that £50 a day is fortune for these down and outs, compared to the basic rate here of £78.40 per day, or £72.50 a day for this latest Stephen Fry drama, and my husband believes he was paid £75 a day to appear as an extra in this blockbuster – three meals a day included too.

It particularly goes against the grain as the Mendes film describes the tortured life ofStuart Shorter, an alcoholic with a violent past made famous in the bestseller Stuart: A Life Backwards.

Stuart Shorter was, when his biographer Alexander Masters first saw him, sitting on a square of cardboard on a pavement in Cambridge at Christmas time in 1998, aged only 30, broken-toothed, hairy, filthy, weird looking, the sort of man people edit out of their consciousness. I’m wondering if I might have walked by himself and not given a second glance.

The crew are filming in Cambridge for two weeks and some of the city’s homeless, including a couple who knew Stuart, have been recruited to play his friends. This is a once in a lifetime opportunity for them, Mendes will make a few million from it, so come on, don’t be mean, pay them the going rate.