The world's largest coracle comes to Pembrokeshire this evening, as a convoy of lorries arrives at Bluestone carrying massive curved beams originally constructed in Switzerland.

The lorries are carrying 51 sections of 23m long gluelam' beam which will fit together to form a giant upturned Cleddau coracle.

The 90m long by 40m wide coracle will form the structure for the new waterpark at the Bluestone holiday village.

The shape has not come about by accident. When architect Gareth Howell of Powell Dobson began doodling ideas at the conceptual stage, the shape of an upturned boat came naturally to the fore.

After further research into boat-building techniques and timber construction, Gareth started thinking about coracles, and discovered that coracles tended to differ in design according to which river they were to be used upon.

Consequently, the design started to reflect the rounded front, squared-off back' shape of coracles traditionally used on the River Cleddau, which runs close to the Bluestone site.

The traditional method of constructing coracles, which involves laths of wood woven together with a hide or other water repellent, is also reflected in the construction of the waterpark.

The coracle frame is due to arrive at Bluestone this evening. Log on on Monday for a video interview with Bluestone CEO William McNamara.