Buy secondhand, or buy furniture that has been converted from something else (e.g. railway sleepers). For wooden furniture, check it has the FSC logo.
If the items are of good enough quality they can be refurbished for reuse. Contact Kennet Furniture Project in Devizes (01380 720722) or the British Heart Foundation store in Swindon (0844 248 9119), to arrange collection. (NB Kennet Furniture Project does not seem to want single armchairs.) Sell on ebay or other sites; give away on freecycle.
A.R. Fitzpatrick & Sons Ltd, The Old School, Rockley, Marlborough, Wiltshire. 01672 513365. Antique, clock, barometer and furniture restorers and upholsterers (up to c. 1950s).
Local directories list other furniture restorers.
Take to Marlborough Household Recycling Centre (01672 516696) and speak to the guys who run the site. To have it collected by Wiltshire Council, see separate entry Bulky Waste Collection.