Bad British weather makes for a bad day on the motorway.A freak hailstorm causes chaos for the patrollers as three cars crash off the motorway at high speed – and one is left upside down in a farmer's field.A driver is forced to stop in heavy snow when her windscreen wiper falls off and she can't see what's in front of her.And how proper preparation prevents disaster – when the patrollers come across a vehicle broken down in a live lane on the M6 they discover the driver's OK because he's brought tea and biscuits with him, just in case.