|Donald Campbell drove his boat Bluebird to speeds of 276.33mph (444.71km/h)
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The Donald Campbell has broken the world water speed record, becoming the first man to break the world land and water speed records in the same year.
He reached an average speed of 276.33mph (444.71km/h) in his speedboat, Bluebird, this afternoon on Lake Dumbleyung in Perth, Western Australia.
The feat shatters his previous world record of 260.35mph (418.99km/h) at Lake Coniston, Cumbria, in 1959.
Mr Campbell has been trying to realise his record-breaking attempt for months at various locations in Australia.
Each time he has been frustrated. The weather at his first choice of location, Lake Bonney in South Australia, proved too unpredictable.
Then, he moved to Lake Dumbleyung, near Perth, on 16 December, only to be delayed by wild ducks which could not fly away because they weremoulting.
The weather was the next setback, as persistent easterly winds raised waves up to 2ft (61cm) high, making any attempt impossible.
With time running out for him to achieve his goal of breaking both speed records in the same year, he began considering a move to a third lake just south of Perth.
'Let's go, skipper!'
Then suddenly, on the last possible day, the winds eased and the lake became flat calm.
Conditions were rated 95% suitable, and the chief mechanic, Leo Villa, radioed to Mr Campbell, "I think it's worth a try - let's go, skipper!"
Several hundred people gathered on the shores of the lake to watch, among them Mr Campbell's wife, Tonia Bern.
When she heard that he had done it, she dived into the lake and swam out to embrace him as he brought Bluebird in.
As he stepped ashore, Mr Campbell told his supporters, "It's amazing that we clinched it. I never thought we had the chance of a snowball on the desert of cracking it today."
Mr Campbell broke the land speed record in July on Lake Eyre salt flat in central Australia, with a speed of 403.1mph (648.72km/h).
However, the record was short-lived: on 27 October an American, Art Arfon, drove his jet car across Bonneville Salt Flats in Utah at an average speed of 536.71mph (863.75km/h).