Donations to Philip Goodeve-Docker's fundraising page have exceeded £6, 500 in memory of the adventurer who died during an expedition over the Greenland ice caps.
So far the group, made up of Philip, Roan Hackney and Andy Norman, have reached 162% of their target. Click here to donate through their JustGiving page.
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The meeting was arranged in the wake of Wednesday's terrorist murder of four people in Westminster.
Dozens of women gathered on Westminster Bridge to form a human chain in a show of solidarity with the victims of Wednesday's terror attack.
In a wide-ranging Peston on Sunday interview, he said Parliament security needs reviewing and the PM's counter-terror strategy is flawed.