The forward – who netted twice last night as Roy Hodgson’s side overcame Switzerland in their opening EURO 2016 qualifier – will head to pastures new now the international break is over after completing a £16m deadline day switch to north London.
Welbeck graduated from United’s academy before going on to become a key first-team player, but new manager Louis van Gaal deemed him to be surplus to requirements as the transfer window closed as he secured Radamel Falcao on loan.
Arsene Wenger moved for the 23-year-old to sort out his side’s attacking problems, and Butcher believes that those in charge at Old Trafford have made a big mistake in letting the versatile striker go:
“Man United will regret selling Danny Welbeck to Arsenal,” he told talkSPORT. “He’s got blistering pace, is a good team player and finishes very well.
“The way Arsenal play, and the chances they’ll give him, will make Man United regret their decision.
“He’s enjoying his football at the moment. Arsene Wenger must be purring because it is a superb piece of business.”