THE £440m Westgate redevelopment remains on track despite tonnes of concrete meant for the site setting before it arrives due to Oxford's roadworks.

According to contractor Hanson delays at the Cutteslowe and Wolvercote roundabouts have caused deliveries of concrete to become too hard to use.

The firm, whose trucks travel from a plant in Stanton Harcourt, has applied to Oxfordshire County Council to divert its mixing trucks to avoid the work after experiencing delays of more than 40 minutes.

Oxford City Council leader Bob Price said the problem had not caused any long term setbacks to the project which is due to be completed in October 2017.

He said: "The obvious answer is to use the Abingdon or Botley Road as traffic can pass through quite freely to get to the site.

"As far as I'm aware there are no problems at the moment and everything remains on track and on time.

"I have spoken to the developer and it is all going well."

The mixing trucks currently use the A415 and then the A40 but the application would see them diverted through the village of Sutton and on to the A420.

Oxfordshire County Council is set to approve the route change at a meeting on Monday.

In a report deputy director for Environment & Economy Bev Hindle said: "They [Hanson] have found that concrete mixer trucks delivering concrete to the Westgate Centre redevelopment in Oxford city centre have been caught up in delays on the A40 heading into Oxford due to roadworks on the Cutteslowe and Wolvercote roundabouts.

"The delay has meant that the concrete has arrived at the Westgate Centre time expired and therefore cannot be used and has had to be returned to the site.

If approved 21 mixing trucks would switch to this route until the completion of the Wolvercote and Cutteslowe Roundabout works in November 2016.

The revamped Westgate centre - complete with more than 100 new stores, 25 restaurants and cafes, a boutique cinema, roof top terrace and new public spaces - is due to open in October 2017.