A few years ago, I noticed an unprecedented L. interest in roof gardens. They’re for people who live in cities wanting their own private green space. If we give thousands of people these green spaces, we will enjoy environmental benefits such as a reduction in the urban heat island effect.
In high-density areas not everyone has access to green private spaces, so we’re essentially creating useable outdoor areas for them. Our highest roof garden has been 36 storeys up. It can be difficult for Londoners because local authorities generally oppose roofgardens, so we fight on behalf of clients struggling to get permission.
Our roofgardens are 30 per cent greenery and we make them stunning and architecturally relevant. There is one very succulent plant, sedum, which we now use for green roofs. It’s the first locally grown British product to be targeted specifically for domestic use like this.
I love putting beech trees on roofs. They give shade, texture, variation, shape and colour.
Tip: Be adventurous. Introduce unusual plants to a roof.

Today’s green londoners, part of LBC’s 97.3 FM’ Green Week on Afternoon Delight, the New Alison Bell Show (Mon-Fri, 1-4pm)