There is a photo of the shop (and their logo), which was located (for eight years) on the upper level of The Glades in Bromley, together with comments about its closure in 2017 at this link:
https://www.facebook.com/p/Save-Head-Bromley-100054266061167/?_rdr
https://www.facebook.com/p/Save-Head-Bromley-100054266061167/?_rdr