Before Mr Johnson's airborne and sub aqua escapades, events in late 2004 would themselves have been enough to sink many a politician.

BBC: Highwire act Boris Johnson defies political gravity

The litter-pick was carried out by Kendal and Lakes Sub Aqua Club.

BBC: Windermere clean-up finds traffic cones, signs and shoes

Mr Hackman said the current pool was used "extensively" by sub-aqua and diving clubs.

BBC: From the section Manchester

Mr Smith also became a member of the British Sub-Aqua Club (BSAC), because he also "wanted to dive for pleasure".

BBC: Diver John Smith

Paul Fry, diving officer for the Kendal and Lakes Sub-Aqua Club said only experienced divers would take part because of the "hostile" conditions.

BBC: Divers plan new lake litter pick

The British Sub-Aqua Club has arranged the clean-up for 2 March.

BBC: Divers plan new lake litter pick