We are a business in Northampton which gets a large amount of dry, clean chipboard pallet tops. Can anyone recommend someone where we may be able to send this for recycling at a net-zero-cost to our business. We can deliver. 

There are companies scu as this one that recycle chipboard: http://www.wastenot.uk.com/mdf_chipboard_plasterboard_recycling.html 

I think with this one it may not be cost effective unless you have 20 tonnes of chipboard! However there may be similar companies out there. Googling 'chipboad recycling' is the easiest way!

You can find a wood recycler near to you from this directory: http://www.recyclewood.org.uk/