Travellers are being met with significant delays as Oxford airline bus services are impacted by a serious crash on the M40 this afternoon (April 30). 

Police have confirmed the motorway is closed in both directions near junction 8A and a diversion is in place. 

READ MORE: Lorry crashes into bridge and closes motorway in BOTH directions in 'serious' incident 

Thames Valley Police said traffic is flowing through the junction slowly.  

The Oxford Bus Company has said the M40 closure at the Bicester junction is "currently having a detrimental impact on airline services, causing delays".

The crash took place between J9 near Bicester and J8A near Oxford in the northbound carriageway.

As a result, the 2.10pm airline service from Oxford to Heathrow and its return trip at 4.10pm from Heathrow to Oxford will be unable to operate.