Duncan Titmarsh became the UK's Lego Certified Professional in 2010, building models and creating tours, including a huge model of Tower Bridge which could carry a real Land Rover. This fully functioning set was made from 5,805,846 individual LEGO bricks, breaking the previous Guinness World Record by 470,646 pieces. Laid end to end, the bricks would stretch for almost 200 miles, or from Tower Bridge in London to Paris.

He then formed his own company, Iconic Bricks, which has built dinosaur trails and pirate spectaculars. Duncan also collects Lego and runs a Vintage shop within the company. 

Mark Simpson visited Duncan and his team in Bordon, to find out about his passion for toy bricks and experience the wonder of their latest 38 model trail - Extinction - which includes Dodos, gigantic woolly mammoth and a spectacular Sabre Toothed Tiger.

Extinction debuts at Marwell Zoo this summer. It runs from Saturday 19th July until Sun 7th September.