The new Lord Mayor Alderman Andrew Parmley sailed downriver as part of a flotilla during driving rain for the Lord Mayor's Show.
Until 1757 the Lord Mayor's Show involved a new Lord Mayor travelling by water to Westminster and back. Today the land procession through the city features displays which are still known as floats.
Since 2011 the Lord Mayor has begun the inauguration day by coming by water from Westminster and passing through Tower Bridge before before being driven into The City.
On Saturday morning Ald Parmley embarked at Westminster Pier on Golden Sunrise which replaced Gloriana which usually carries the Lord Mayor.
The party stood on the stern holding umbrellas and ready to wave at the few people braving the rain on the bridges.
There was an accompanying procession of 24 traditional Thames boats from Londonís livery company, the Port of London Authority and the Fire Service.
The livery craft crews had to row against an incoming tide which slowed the speed. The journey to HMS President downstream of Tower Bridge was timed to take just an hour.
Ar 9.30am Tower Bridge opened to welcome the new Lord Mayor.
A fireworks display was due to be held on King's Reach, between Blackfriars and Waterloo Bridges, at 5.15pm