POLICE have shared a video of an oblivious driver on the motorway as they urge motorists to ensure they can see out of their rear windows.

The video shows a driver in the fast lane of the M4 who fails to see a police car with its siren blaring behind them and move out of the way.

Officers behind the vehicle begin weaving to the right and left to appear in the driver's wing mirrors - but the technique appears to have little success. 

Police have urged people to ensure they can see clearly through the back window of their car thorughout the Bank Holiday Weekend in case of a similar emergency situation.