I have complained about these people for months and been accused of racism and every over ism I can think of.
My complaint is not because they are probably Romanian or Bulgarian ( although new members of EU have no rights to work here ).
I have been attacked also for calling it begging when it blatantly is.

Their relations seem to be at Beckenham Sainsbury's , no one at Lidl ( I wonder why ).
I have e mailed Sainsbury but did not get the courtesy of a reply.
I give to a number of charities but refuse to give to these people.
Perhaps someone else would like to try with Sainsbury's. I undertsand someone spoke to Big Issue but apparently they did not seem to care who was selling their product.
I just ignore them or occasionally say > The Big Issue is why are you here <.
Good Luck to anyone attempting to stop this begging in SE 23