• Winger signs contract at Eastlands until 2014 • 'We are always keen to sign British talent,' says Mancini

Manchester City have completed the last-minute transfer of the Middlesbrough winger Adam Johnson.

The former England Under-21 winger, who had been the subject of a previous bid from City, passed a medical this afternoon and has signed a contract until June 2014. No fee has been announced but it has been reported that Middlesbrough will get around £7m.

"We are delighted that Adam has chosen to come here," the City manager, Roberto Mancini, told the club's website. "He is a very good player with fantastic potential, and as a club we are always keen to sign British talent."

Johnson said he believed it was time for him to leave his "comfort zone" on Teesside to become a better player. "There has been a lot of speculation about me but I'm just glad to get it done and be signed and ready to go," he said.

"There are a lot of reasons [for the move]. City are a club going places and they are doing very well. I wanted to come and try to better myself instead of staying in my comfort zone at Middlesbrough.

"I want to be the best player I can possibly be and I think that is going to be the case coming to City and playing with world-class players.

"When a big club comes in for you life's too short to turn down an opportunity like this. I was wanting it to happen quite badly and I'm dying to get started now."

As Johnson leaves Middlesbrough, two new faces who have moved to the Riverside are the strikers Scott McDonald and Lee Miller from Celtic and Aberdeen respectively. The Championship side have also tied up a loan deal for Tottenham's Kyle Naughton.

Meanwhile Boro's Egypt international striker Mido has joined West Ham for the remainder of the campaign after spending the first half of the season on loan at Zamalek back in his homeland.