I'm seeking advice on a large sycamore tree which is between the end of my garden (46 Brightfield Road) and the River Quaggy. According to recorded land registry drawings, the tree isn't on my property but I'm not clear if the river & the river bank are maintained by the Council.�Over the last 2-3 weeks, a number of big branches have snapped off. The branches are getting increasingly larger with the latest being 1.5 stories tall. I suspect the tree (and other trees along the river bank), need urgent work to ensure more serious damage or injury doesn't occur. I also think the trees play a role in holding up the river bank.I have attached images of the tree, the latest fallen branch and a map of the location of the tree.I'd be grateful for a response as soon as possible about 1) tree ownership and 2) a possible 5 day notice for tree management

46 BRIGHTFIELD ROAD, LONDON, SE12 8QF