In the first of the series, Mr Gavin talks about what Chelsea means to him and what it takes to create a garden at the world-famous flower show.
Watch the rest of the videos here
The 80ft Westland garden, titled 'A Wondrous Odyssey', was awarded a Silver-Gilt Flora medal and also received a special honour in the form of the Most Creative Show Garden prize, which hasn't been awarded to a garden in five years.