One of my favourite gardens was Marcus Barnett's Mondrian inspired design, with its simple blocks of colour and texture. I also like the effect of the industrial tram lines in the Rich' brothers garden, these created a sense of movement and strong lines we could all copy even if we can't stretch to a moving summerhouse. The planting within the tramlines also shows that applying a little thought allows even trafficked areas to be green - something we should all emulate when turning gardens into driveways and parking spaces.
In contrast to gardens inspired by art and architectural movements, it was interesting to see those drawing on very personal stories and experiences from Charlie Albone's The Time Inbetween about the loss of his father to Kamelia Bin Zaal's Beauty of Islam. When designing gardens for clients, it is sometimes personal events or stories which can provide the inspiration - maybe certain plants remembered from childhood or a favourite place.