Instead of such a "double lock", the commission floated the idea of a "double count", where the proportion of English MPs supporting a Bill would be published alongside the overall result.

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With Canadian trusts and preferred stock you can still lock in double digit yields.

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At that point, Paul Volcker, then the Federal Reserve chairman and now an advisor to President-elect Barack Obama, successfully brought down inflation, allowing investors to lock in double-digit Treasury yields.

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At 4in long, they are over double the length of the average Yale lock key.

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You lock up your capital until retirement, but it is protected from double taxation.

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