Lewisham say's

https://lewisham.gov.uk/articles/news/ch...-recycling

You can recycle your real Christmas tree from 2 January to 28 February 2020.
Bring your tree to one of these collection points:

Hilly Fields, entrance in Hilly Fields Crescent
Blythe Hill, entrance on Codrington Hill
Deptford Park, entrance in Scawen Road
Telegraph Hill, Pepys Road/Kitto Road entrance
Talbot Place, Blackheath
Mountsfield Park, entrance at top of George Lane
Sydenham Wells Park, entrance in Wells Park Road
Forster Memorial Park, top entrance on Whitefoot Lane
Northbrook Park, Baring Road entrance
Mayow Park, entrance in Mayow Road
Chinbrook Meadows, Amblecote Road
Manor House Gardens, Old Road entrance (you can’t recycle your tree at Manor Park).

If you have a garden waste bin, you can use it to recycle your real Christmas tree. Just cut it into pieces no bigger than 10cm thick and 50cm long.

You should remove all decorations before recycling your tree. You can’t put artificial trees in your garden waste bin.