Taken from the highway code online -
Rule 141 You MUST NOT overtake
* if you would have to cross or straddle double white lines with a solid line nearest to you (but see Rule 108)
* if you would have to enter an area designed to divide traffic, if it is surrounded by a solid white line
Rul 108 - Double white lines where the line nearest you is solid. This means you MUST NOT cross or straddle it unless it is safe and you need to enter adjoining premises or a side road. You may cross the line if necessary to pass a stationary vehicle, or overtake a pedal cycle, horse or road maintenance vehicle, if they are travelling at 10mph or less.
27-May-2004, 11:21 
Threaded Mode