I would advise anyone if you see a rough sleeper to call 0870 383 3333 to make a referral to Southwark SPOT or London Street Rescue. This line is staffed 24/7 and is the fastest way of getting people help via an outreach team. If you don't have a name give a very good physical description with details of when you have seen them most often (time of day, very specific location). If the people make the call themselves that's always better but if they're not engaging and a bit 'scary looking' that may not be likely.