If it is not possible to create a large green space in Nottingham, maybe atrium spaces with light wells could be designed within buildings. This will inject buildings with a bit of nature, and promote mental well being in the workplace.
After looking at examples online I have noticed that smaller spaces have used small walls as planters, and used the height of the plants as the room divide. Living walls also seems to be popular in small spaces, because one wall can be adapted easily with a variation of plants, to transform a space.
"Small atrium spaces provide natural light and other elements into office environments. This will allow people to connect to nature, while working within the office, which will benefit their well being."