I don't think I@d be strong enough to get my bike into that!!
Best practice is use a U-lock through the rear triangle which secures the back wheel and frame (the most valuable parts of any bike) in one go. This design seems to preclude that, although a minor modification would allow it. Coincidentally the bike in the background seems to have had its rear wheel stolen!
Barry King also sent me this link:http://cyclepods.co.uk/When I fist came to Coventry in 1977, the bicycle sheds included spaces where half the bicycles were stored almost vertically - between each horizontal bicycle there was a verticle one. Alas the number of people cycling to work declined and the sheds weren't bolted down. So on very windy days they started to be blown about. I don't know whether any crashed into someone/something!
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