Shocked drivers watched on in astonishment as a woman cycled along the M40 motorway near Beaconsfield, yesterday.

Police were forced to use a road block to catch the cyclist after motorists dialled 999 shortly after 10am.

Officers stopped the woman between junction 2 (Beaconsfield) and 1.

Thames Valley Police has today confirmed that a woman in her 20s was detained under the mental health act.