LONDON (AFP) - Michael Vaughan has urged England to keep their heads after a huge 267-run loss in the third Test at Perth saw Australia level the Ashes at 1-1. Vaughan, England's Ashes-winning captain on home soil in 2005, has said now is not the time for wholesale changes. But he believes England need to win the Boxing Day Test in Melbourne because Sydney, the venue for the fifth and final Test, will favour Australia. And Vaughan said England had to give off-spinner Graeme Swann more overs come Melbourne. "I don't think they will panic. I don't think there will be changes," Vaughan told BBC Radio Five's Sportsweek programme. "I'm sure England will come back. It just depends on the pitch. If the pitch is slow at the MCG (Melbourne Cricket Ground) I am sure England will fancy it. "I think England will have to win at the MCG because I do think the Sydney ground will have some pace in it." Vaughan would like to see Swann bowl more overs in Melbourne and has also backed batsman Ian Bell to move up the order.