Dear Cecily
Thank you for posting this message as this woman, and I expect it is the same one or a close colleague, has carried out this scam in se23 for a long time. She, or someone like her, has approached residents from Perry Vale/ Catford to Forest Hill/ Sydenham.
A couple of years ago she pulled this scam on one of my new, and then as yet unmet, neighbours, giving my address for them to call and collect the reimbursed money. Of course you can imagine they were very upset when they did call and realised that they had been taken for fools when they thought they had been doing someone a good turn.