If you love this stuff - as I do - then check out Gentle Giant. This song in particular is very similar to their style. They can be difficult to get into at first, but once you do, your horizons will be considerably broadened, trust me. Start with Free Hand and the rest will follow. Pink Floyd, Genesis, Yes, King Crimson and Gentle Giant are my top five, followed closely by Caravan, ELP, Camel, Hatfield and the North, Jethro Tull, Gong, Egg, National Health, UK, Brand X, etc. etc. All are excellent English Progressive Rock.