Seems pretty reasonable to me. Earning the minimum wage (£7.20) doing 37 hours a week for 48 weeks a year earns one £12,787.20, which is 61% of the median income, about the level the government defines as relative poverty. (Note, I chose these numbers to get this result intentionally.)
Earning £10 an hour isn't much better, in many parts of the country you'd seriously struggle on this, especially as a single person or supporting a family. E.g. earning £18,750 p.a. is only £1,326 per month after tax - the average rent in the UK alone is over half that. Even that's more than workers in many low paid jobs get, e.g. cleaners, retail, kitchen assistants, hair dressers, launderers, waiters, and bar staff, according to
wikipedia.