Table 1.

Participant details

ID	Placemet	Age	Sex	Occupation	Country of Origina	Primary Behaviour	Secondary Behaviour, tRandomisation outcome
1	London park	31	M	student	Italy	unhealthy diet	- intervention
2	London park	37	M	security controller	UK	smoking	risky drinking, intervention
3	London park	36	M	builder	UK	smoking	risky drinking, control
4	London park	30	M	public relations	UK	smoking	risky drinking, control
5	London park	28	F	PhD student	Germany	smoking	unhealthy diet, intervention
6	London park	47	M	academic researcher	UK	lack of exercise	-control
7	London pub	32	M	sales person	UK	risky drinking	-intervention
8	London park	25	F	student	UK	unhealthy diet	risky drinking, control
9	London park	19	M	student	UK	risky drinking	-control
10	London park	32	M	engineer	UK	Unhealthy diet	risky drinking, intervention
11	London park	45	M	company director	UK	smoking	risky drinking, intervention
12	London park	52	F	musician	UK	unhealthy diet	lack of exercise, control
13	London park	38	M	market researcher	UK	lack of exercise	unhealthy diet, intervention
14	London park	34	M	computer engineer	UK	unhealthy diet	risky drinking, control
15	London park	21	M	student	South Asia	unhealthy diet	-intervention
16	London park	28	F	youth worker	Poland	unhealthy diet	risky drinking, control
17	London park	28	F	archivist	UK	unhealthy diet	-control
18	London park	57	M	Door Manager	UK	unhealthy diet	risky drinking, control
19	London park	24	M	student	UK	risky drinking	-intervention
20	London park	24	F	student	Sweden	unhealthy diet	risky drinking, control

^aCountry of origin - observed/ learned through discussion during the interview. T In this paper secondary behaviours were disregarded as there was insufficient detail in the interview data as not the focus of the discussion