MKFM understands there has been a collision on the A5 in Milton Keynes causing heavy traffic.
UPDATE - Traffic is now moving slowly.
The A5 in Milton Keynes is closed due to crash Northbound from A4146 (Mcdonalds roundabout / Kelly's kitchen roundabout) to A4146 Bletcham Way (Bletcham / Caldecotte Roundabouts).
Traffic is building on alternative routes while people avoid the A5.
AA Traffic report congestion to Newton Leys and delays of seven minutes on the A421.
MKFM will update this article with information as it comes through.