Traffic around Borough High Street and Tooley Street ground to a halt on Friday when London Bridge was closed northbound by a burst water main on the north bank.
Water gushed onto Lower Thames Street from the burst main on the northern side of the river. Police closed the northbound carriageway with cars and buses directed down Duke Street Hill towards Tooley Street and Tower Bridge.
Transport for London says that the disruption will continue until Monday morning at the earliest whilst the water main is repaired. Transport for London is urging motorists to avoid the area and bus routes 17, 21, 35, 40, 43, 47, 48, 133, 141, 149 and 521 are subject to diversion and delays. Bus tickets are being accepted by London Underground.
The situation wasn't helped by a security alert in Borough High Street in the middle of Friday morning.
On Saturday there could be further disruption as Southwark Bridge, the closest river crossing to the west, will be closed to traffic while it hosts Feast on the Bridge as part of The Mayor's Thames Festival.
To the east Tower Bridge is due to lift eight times on Saturday and 12 times on Sunday.
• London Bridge will also be closed to cars and buses all day on Sunday 23 September as it forms part of the route of the Hovis London Freewheel.