There have been some general concerns about dog and puppy thefts in London, and also some reports recently of people acting suspiciously in some other greenspaces in Wandsworth – eg asking dog owners about their dogs, and/or taking photos of the dogs. There have been no reported incidents of concern on Tooting Common, which is re-assuring. However dog owners using Tooting Common may want to be generally aware of these reports, and to be vigilant to eg anyone asking questions about their dog(s).
Also, if you know of any actual theft, or see someone acting suspiciously, please report it to the police on 101, so that any incidents can be logged and acted on.