I would have guessed there are more than 890,000 on minimum wage. Checking the minimum wage commission's figures there are 1,077,000 jobs on minimum wage. Many are part time so presumably there are around 187,000 people who have two minimum wage jobs.
The figure still seems low from my experience.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates