A CRASH on the M4 motorway is causing heavy traffic near Windsor and Slough.

According the AA live traffic updates, there are "severe delays" on M4 Eastbound between J6 A355 Royal Windsor Way (Slough / Windsor) and J5 A4 London Road (Langley / Heathrow).

A crash involving a car and a lorry has caused lane closures and "increasing traffic delays".

There is an average speed of ten mph.

Normal conditions are expected to resume by 4.15pm today (June 22).