Mark Scoular, a police officer and ex-Royal Marine who founded Commando 999, said that the Marines would not let the bad weather hamper their marathon challenge over Remembrance weekend.
"It is wet, but we will all be cheery and absolutely fine, I'm sure. It will be a good old pace but we are all looking forward to it."
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Four men have admitted conspiracy to burgle in connection with the Hatton Garden safety deposit raid.
Thousands have begun walking to Austria from Budapest, as others break free of transit camps elsewhere in the country.
Cool weekend ahead but looking dry for many with sunny spells.