But United boss Alex Smith said: "He has played around 10 or a dozen times for the Under-21's and featured in four or five of Chelsea's games in pre-season.

"Berti Vogts took him to the Far East with Scotland during the summer, so he is one with a very bright future.

"Now that he will be getting the chance of regular first-team football with us, it has to be good news for the national team as well."

Cummings played 16 times, mainly as a substitute, for West Bromwich Albion as they won promotion from the First Division last season.

It was his second spell on loan with the Midlands club, having previously been farmed out to Bournemouth.

Cummings was at Tannadice on Friday morning to complete the necessary paperwork and United hoped he would be signed in time to face Motherwell on Saturday.

McConalogue was a top schoolboy scorer

Pacey 21-year-old McConalogue has made a number of first-team appearances but has been out of the picture this season.

Clyde boss Alan Kernaghan told his club's website: "Stephen has been brought in to try and get us goals and he will feature at some stage tomorrow."

McConalogue is the all-time top scorer for Scotland Schools and had a brief loan spell at Morton last season.

Morrison impressed Kernaghan during a trial period and has now signed a one-year contract.

Former Ayr United midfielder Neil Scally has left Broadwood without winning a permanent deal.