[21]

Now being built, the "can of ham":

https://architizer-prod.imgix.net/media/1422058020643Can-of-...

http://media.gizmodo.co.uk/wp-content/uploads/2015/01/Contri...

[wahern]

So are Brits good a coming up with nicknames, or are they simply more apt to build enormous buildings that look like common household items?

[Symbiote]

In order to get permission to build a large building in central London, it's necessary to have a distinctive, unique design. The city does not want to look like America.

Hence, the Gherkin, Cheesegrater, Can of Ham, Walkie Talkie, Shard, Helter-skelter.