Various charities will actually collect your old furniture from your home to sell on for their charities.  One of those charities is the British Heart Foundation.  Follow this link to book a free collection:   https://www.bhf.org.uk/shop/donating-goods/book-a-free-furniture-collection .  Age UK MK also offer a collection service – http://www.ageuk.org.uk/miltonkeynes/shops-and-furniture-stores/secondhand-furniture/British Heart Foundation