This Weekend / Powerboats - Circuit World Championship, Cardiff

This weekend the redeveloped Bute East Dock in Cardiff, with its shops and restaurants, will be a busy place, if only on the water. The large dock stages the Formula One British championship, the fifth round of the Formula One world championship and the second round of the Formula Three world championship. A national event for Formula Four tops up the noisy mixture as the catamarans race up and down the dock. On the inland circuit, the two-litre Formula One boats can accelerate from 0-60mph in less than two seconds. At Cardiff, they will achieve speeds in excess of 120mph. Jonathan Jones, from Cardigan and three-times world champion, will have the local support, while Steve Kerton, of Cricklade, second in the championship, is tipped to do well.

Where to watch: Bute East Dock, Cardiff, is RAC signposted on A48 from M4. Spectators can watch the racing from the Central Link side of the dock. Tomorrow, heats and qualifying start at 12.45pm. On Sunday, final qualifying begins at 11.45am and the racing proper follows it.