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 129)
• if you would have to enter an area designed to divide traffic, if it is surrounded by a solid white line
• the nearest vehicle to a pedestrian crossing, especially when it has stopped to let pedestrians cross
• if you would have to enter a lane reserved for buses, trams or cycles during its hours of operation
• after a 'No Overtaking' sign and until you pass a sign cancelling the restriction.

Laws RTA 1988 sect 36, TSRGD regs 10, 22, 23 & 24, & ZPPPCRGD reg 24