However, United would also be willing to sell the player now rather than risk losing him to a fee that would be decided by a tribunal in the summer.

Morrison – who will be 19 on Thursday – has been mired in controversy throughout his fledgling career and there are some on the Red Devils staff who believe his huge potential will never be fulfilled.

A member of the triumphant FA Youth Cup-winning side last term, it was anticipated Morrison would make a breakthrough this season.

Instead, he has been restricted to just two substitute appearances – both in the Carling Cup – and did not even manage a place on the bench throughout Sir Alex Ferguson’s massive first-team injury problems.

Although Ferguson has been reluctant to discuss Morrison in public, it is almost certain he would have spoken to old friend Sam Allardyce before the Hammers made their move.

It was claimed by someone close to the deal last night that there was a “50-50” chance of Morrison leaving United before the transfer window closes, although it is becoming increasingly likely the Manchester-born youngster will quit.