KARL Robinson admits the last month has made him “delirious”, but Oxford United’s head coach says he cannot complain about a lack of backing.

The month-long scramble to make changes to the squad saw four players sign and eight leave before the last night’s deadline.

It has been a hectic spell which has taken Robinson into Europe, so there was some sense of relief when the window shut.

He said: “The transfer window sends you barking mad sometimes. I’ve become a bit delirious.

“My daughter said to me last night: “Dad, you’re weird.” Everything does feel very strange at the moment.”

The signings included a transfer fee for Mark Sykes, while United came close to a loan move for James Vaughan which would have involved a substantial cut of the Wigan Athletic striker’s wages.

He moved to Portsmouth instead and Watford’s Jerome Sinclair took the No 9 shirt.

Robinson was grateful for the support from chairman Sumrith ‘Tiger’ Thanakarnjanasuth.

“Tiger was willing with a certain striker to really go heavy,” he said.

“I want to say a big thank you to the board, because they gave us the funds to do whatever we needed to do.”

The U’s chairman was the subject of protest messages in the East Stand for the home game with Barnsley on Tuesday night.

The Oxford Ultras hung their banners upside down “to display our discontent with how the club has been run under Tigers ownership”.

United have been hit with three winding-up petitions over late tax bills to HM Revenue & Customs since Tiger’s takeover last February.

Robinson admitted earlier this month the uncertainty caused by the financial difficulties had been brought up by transfer targets.

And the protest did have an impact, according to the head coach.

“Tiger was hurt by that and I know he spoke of his disappointment on that,” Robinson said.

“We can understand the fractious (reaction) with some of the things that have happened.

“But at the same time Tiger’s dedicated to the club and I see that on a daily basis.”

And despite the backing, Robinson admitted there were big lessons to learn from January.

He said: “We’ve seen in this window what it might take to get a player of a certain level of quality.

“I think it’s been a reality check and I think we will take note of that as a football club.

“If you want to be competitive at this level you’ve got to really spend big on a striker.”