OMG
"YN proposes morphing the lane into an ice skating conduit come the cold weather. Never mind that it doesnt really get frigid enough in London to sustain a safe, frozen passageway. I like the creative thinking."
This is typical design-junky thinking, that the CONCEPT itself can trump the practical realities of the case proposed. Somehow, this is supposed to ensure continued funding, or somesuch.
CLUE: If the concept CANNOT happen, due to some "design" wrinkle, then I shouldn't even have to say: FAIL.