Just guessing...
In the UK power wiring is organised on a ring circuit. With this arrangement you may not notice a broken connection because power will come from the other side of the ring.
If a second connection then breaks on that circuit a string of outlets will suddenly become dead.
Examine all sockets (including the working ones) - don't stop checking when you find the first bad connection.
Good luck...
Peccavi
February 2009
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