Mrs Redfearn, 37, works part-time as a lecturer in midwifery and looks after the children, who attend Arnhem Wharf state school. The Redfearns pay £600 a month towards the £80,000 mortgage on their Isle of Dogs home, £250 to pay off a loan for their Vauxhall Vectra, with ?100 a month going on petrol, tax and insurance.