The Sun has published photographs of the Spice Girls rehearsing for a performance.
Posh Spice Victoria Beckham, 38, Ginger Spice Geri Halliwell, 40, Scary Spice Mel B, 37, Baby Spice Emma Bunton, 36 and Sporty Spice Mel C, 38 were snapped clasping microphones as they stood on top of black cabs.
There have been rumours that the girl band have come together for a one-off reunion at this Sunday's Olympic Games closing ceremony.
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In a tweet on Saturday, the US president didn't give a reason for his absence but said he wished"everyone well and have a great evening".
Weather conditions remain wet and windy through the weekend.
Mr Banks has given Ukip leader Paul Nuttall an "ultimatum", saying if he is not made chairman he will stop supporting the party.