One thousand officers a day will be on duty during the Olympics in the biggest safety operation Transport Police in the south have ever staged.
Click below for the full report from our Transport Correspondent, Mike Pearse
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Cloud and rain first thing but it will gradually dry up from the north west. Becoming bright in the west, staying quite cloudy in the east
Rain becoming more persistent overnight. Rain and cloud slow to clear tomorrow but becoming dry by the afternoon. Some brightness later
Rain becoming more persistent overnight. The rain gradually clearing tomorrow morning then sunny spells for the afternoon, feeling cooler