Rangers have threatened to quit the Scottish game this week over their unhappiness over proposed restructuring plans. The Glasgow club were reborn in the Scottish Third Division after being liquidated last year.
Celtic have qualified for the last 16 of the Champions League, but face a fight to keep their squad together as clubs from richer leagues eye their best players. Celtic and Rangers have never hidden their desire to move to a bigger stage to maximise their income from television contracts.
"I’d like Celtic and Rangers to play in England. I’ve said that for a year or two," said Redknapp.
“They are two of the biggest clubs in word football and it would also give someone else a chance to win something in Scotland if they left.
“Look at their support – if you go all over the world you’ll find supporters of Celtic and Rangers.
“We’ve got a Welsh team in the Premier League, so why not two Scottish teams?”