However, last year he ignored the fact that RPI was minus 1.4 per cent in July, and imposed a 3.9 per cent increase on the Tube and 12.7 per cent rise on the buses. Jo deBank, spokeswoman for commuter group London TravelWatch, said: "We know there's a funding gap in TfL but we don't want to see people priced off public transport. It can't become too expensive to use."