Complex sentence: This is a nationwide scheme, run by Ascension Trust, that Bishop's Stortford has become affiliated to, providing practical support in the form of water and flipflops, and an opportunity for people to talk.
Split into simpler sentences: This is a nationwide scheme that Bishop's Stortford has become affiliated to, which is run by Ascension Trust. It provides practical support in the form of water and flipflops, and an opportunity for people to talk.