One to be aware of which has just come up locally on Twitter via the Met.
Thankfully in this case the suspect has been arrested.

@MPSLewisham one distraction burglar caught today. Excellent help by a local resident and all property recovered to the 87 year old.
@MPSLewisham 43m
The member of the public was approached by the victim who informed him of what happened & managed to stop the susp prior to police arrival

The suspect asked the victim if she wanted help with her gardening and she declined. @MPSLewisham The suspect then returned, knocked at the door asking if she could use the toilet and the victim's handbag was stolen