Madeleine Budd damaged the life-sized statue of the World War Two veteran on Friday.
Luisa Santos, 47, inflicted two 'deep' wounds on Hannah Pritchett, who had been working at The Three Horseshoes in Princethorpe, Warwickshire, for just six weeks.
West Ham had lost 2-1 to Eintracht Frankfurt while playing at home.
Police are 'concerned' for the pair and are appealing for the public's help.
A trial date has been set for November.
The former F1 boss will face a jury next year after he was charged following an investigation from HMRC.
The chancellor also caused more uncertainty by denying he'll publish his full economic strategy earlier than planned.
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