The move has seen Marmax replacing all the outdated wooden furniture at the Birmingham visitor attraction with new picnic benches and seating.

It has so far delivered more than 50 heavy-duty picnic benches large enough to seat six adults and with an extra-long table top to make them wheelchair accessible, plus in excess of 30 'Bournville' seats designed especially for Cadbury World - all of them in chocolate brown.

The company is now working on specially designed picnic cabins in the shape of safari jeeps, plus designs for a new outdoor building for use as a fully equipped visitor toilet facility.

The items will save around 217,000 plastic milk containers from going to landfill.

Opened in 1990, Cadbury World is the only purpose-built visitor attraction in the UK devoted entirely to chocolate.