Beautiful, "mad and addictive" world of Chelsea show gardens

Imagine spending £250,000 and working for a year under immense pressure,only for your creation to be pulled apart after just one week. That is what is in store for the garden designers at this week's Chelsea Flower Show.So why do they do it?
"It's been a nightmare," admits garden designer Diarmuid Gavin.
He is talking about his Chelsea show garden entry, The Irish Sky Garden,in which people are invited to fly 25 metres above the ground to view his work.
He also admits it has cost between £300,000 and £400,000.
Despite the "nightmare" however,he believes it is worth it.