United sealed the signing of the summer on Wednesday night when Arsenal agreed to sell Van Persie to their Barclays Premier League rivals for £24million.
Van Persie arrived at London St Pancras train station on Thursday morning ahead of his trip to Manchester to complete his medical.
Manager Arsene Wenger has the best part of two weeks to spend some of the money before the transfer window is closed. He said on French TV on Wednesday night: ‘It’s sad to lose a player of his quality. He had only one year left on his contract so we didn’t have the choice.’