The Eden Project are hosting 3 weekends of science in January 2017. Each is themed (Forces, Space and Microbes). These are to be inclusive family events with accessible science for all! They are looking for speakers, demo’s etc around the themes above. In return they can offer a platform in which you can promote your stuff to a broad audience. they are in the development stage at the moment, so will update regularly!
Details will be here, at ScienceLive.