Donald Campbell's Bluebird has returned to the water for the first time in more than 50 years.

The record-breaking jet-powered boat successfully floated in a loch on the Isle of Bute in Scotland, in an operation watched by Donald Campbell's daughter Gina.

Campbell died aged 45 on Coniston Water in January 1967 when the boat, travelling at more than 300mph, flipped into the air and disintegrated as he attempted to beat his own record.

Campbell's body, with his race suit still intact, was pulled from the Cumbria lake along with the wreckage of Bluebird from the depths in 2001.

Since then volunteers have worked to restore Bluebird to near its original state, but they said the engine had to be replaced.

The team hopes to make full displays in a fully-completed vessel next year following Saturday's flotation test.

Scenes were tense as the team struggled to get the Bluebird K7 into the water at Loch Fad, but the renovated craft was afloat before 4pm.

Project manager Bill Smith, who has worked on bringing up the wreck and restoring it for 22 years, hailed the achievement.

"It was like someone was making a Donald Campbell movie and they'd left a prop bobbing around - it was pretty good," he said.

"I had a big jump up and down, a clap on the back, but I wasn't going to burst into tears or any silliness like that."

Having broken eight world speed records on water and land in the 1950s and 1960s, Campbell was attempting to break his own water speed record of 276mph when he was killed. He was posthumously awarded the Queen's Commendation for Brave Conduct.