If you contact your local council they often have a large item collection service.
Yeah cheers. Lewisham council do seem to operate a recycling option but it's drop off only. At least as far as I can tell.
https://www.lewisham.gov.uk/myservices/wasterecycle/dispose-of/Pages/collection-service-for-large-items.aspx
This page says £15 for collection of a sofa, up to 3 items for £15 apparently.
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If you contact your local council they often have a large item collection service.