What's corroborated

The event is being staged to tie in with the 70th anniversary of Campbell setting the first of four water speed records on the lake.

Organisers had hoped Bluebird could reach 150mph (240km/h) at some point through the week.

After heavy rain and thunder cleared, a second attempt was made at approximately 16:00 BST, but the issue again blighted efforts.

A run at about midday on Thursday saw the same problem.

Dave Warby said a 'tweak' would be required to the power settings to give the craft more power to get up on top of the water.

On Wednesday, pilot Dave Warby reported engine issues.

Strong winds on Tuesday prevented any running.

Jeff Carroll, chairman of the Ruskin Museum, described the failures as 'a perfect example of the struggles Donald had'.

Bluebird was fired up on Coniston Water for the first time since Donald Campbell was killed in January 1967.

Bluebird was again hampered by an engine power issue, twice failing to reach a speed that would enable it to plane.