https://web.archive.org/web/20180927142646/http://www.nuclear-weapons.info/vw.htm
The first British quick-hack meganuke Violet Club, of submegaton class.
Pure U, no Pu, no fusion.
Thus, huge and weird.
Originally it was a megaton officially.
But it appeared that it's less than a megaton.
It was decided that it's still a megaton, as 0.5 megaton is still is almost a megaton.
Then it appeared that it's actually 0.4 Mt. But as 0.4 is still almost 0.5, nobody cared.
Its "safety device".
Due to its peerless safety, it was prohibited to transport it along roads, and even more than just that.
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And yes, the fuse ignition capacitors of all this beauty was powered with commercial motorcycle batteries, which were charged and inserted immediately before the flight.
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Another epic win is the early British designation system. https://en.wikipedia.org/wiki/Rainbow_Code
Violet Club
Green Bamboo
Green Grass
Yellow Sun
Blue Peacock / Blue Bunny / Brown Bunny
Black Arrow
...
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After all of that the famous chicken-warmed demolition charge doesn't look somewhat strange or unusual anymore...