I couldn't help but look into the history of this particular aircraft and found the G-EBBI had a long and interesting history. It was the last of its type used by Imperial Airways, being retired in 1932. It suffered engine failure and a crash landing near Dover in 1926 - taking out a fence and its landing gear in the process, but no injuries. There are several stills taken from a 1928 documentary that show the plane from various angles here:
http://www.impdb.org/index.php?title=The_Imperial_Airway_-_The_Work_of_the_British_AirwaysI wonder if there is a way to precisely date the photo by looking at the way it is painted or other such details. It might be interesting to find somebody who would know about such things.
Looking at the bicycle, I think I can make out the Raleigh heron on the lamp bracket. Unfortunately from an almost dead on front angle there's not much to see of it. The man's fashion certainly seems 1920s appropriate though.