Sweating on the tube? TFL has worked it out...

It seems like the age old issue of how to cool the tube has finally been solved. A while back a mysterious empty cage appeared at Seven Sister's station on the Victoria line where I often change trains on the way home. A typed sign on the side informed commuters that it would be part of "TFL's ongoing commitment to cooling the tube".

Much debate at work - would this be connected to the much vaunted "ice under seats" innovation trailed across the papers a few weeks ago?

Now, the secret is revealed - the answer to the problem is a BIG FAN.

Genius.