I grew up near this part of the country, Clacton has been rough since the 80's 90's, it's always been the worst town on that bit of the coast. Jaywick is such an interesting place, it's not social housing, all privately owned. The history of it, back to the east end holiday makers and blitz refugees is worth looking into. It's the closest the UK comes to a shanty town but on the most beautiful beach and with a really close knit community.
I am not surprised this happened here though. There is an element of 'independence' from the locals where normal rules and laws don't apply in the same way.
So sad for the lady who sadly died and her Grandson.