The Environment Agency has issued 72 flood warnings for the south east, in which immediate action is required, as heavy rain continues to bring travel misery to commuters.
Areas around the River Thames including Greater London, Hertfordshire and Surrey are expected to be worst hit by the downpours this weekend.
More top news
Rahman was ejected from his powerful job in April by an Election Commissioner after being accused of corrupt and illegal practices.
The service was due to start in September but there is no agreement on pay and conditions such as how many night shifts staff will work.
Would you know what to do if you needed help? Here's the official advice from the Foreign Office.