Paralympic athletes have been gearing up for their return to the Olympic Stadium as part of the London Diamond League Anniversary Games.
Gold medal winning sprint runner Jonnie Peacock:
Double Paralympic wheelchair racing gold medallist Hannah Cockroft:
Silver medallist track and field Paralympian Stefanie McLeod Reid:
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Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.
A wet, wintry night in places with rain and hill snow slow to move away from southern Scotland and northern England.