The Arsenal fullback looked set to move to Hull City in a transfer, but the 22-year-old wants to stay in London and the Gunners have sanctioned a temporary move.
Hull reportedly made a 3.75 million pound bid for the right back, which the Hammers were not willing to match, but Jenkinson's desire to remain in London has persuaded Arsenal to allow him to move on loan to the Boleyn Ground.
And Hull boss Steve Bruce has admitted defeat in the race for the fullback, telling Talksport: “I think there were about five or six clubs who would be interested in Carl Jenkinson. He’s a very, very good player. I think Sam Allardyce is in the box seat, because of being in London.
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“It was someone who we showed an interest in. But when a really good young player comes out of Arsenal, or one of the big clubs, then a club like ours will always be looking at them. He’s got about five or six clubs to choose from but from what I understand he wants to stay in London.”
Goal understands Jenkinson still believes he has a future at the Emirates Stadium, despite the summer arrival of 10 million-pound France international Mathieu Debuchy from Newcastle United.
Meanwhile, 19-year-old defender Calum Chambers has also moved to North London from Southampton in a deal worth 20 million euros.
Jenkinson, 22, left Charlton for Arsenal in 2011 as a teenager but has failed to hold down a regular first team place at the Emirates.