Or double carpet. Three to one is called as 'carpet', which derives from criminal slang for a three-month 'stretch' in prison.
Your stake: £1 win
Horse wins: £33 profit
2/3 place: No pay-out
Your stake: £1 e/w (£2 bet)
Horse wins: £41.25 profit
2/3 place: £7.25 profit
(Based on a handicap with more than 16 runners, such as the Grand National. Each-way payouts can vary depending on the size of field and type of race)