The Tate & Lyle factory is amazing. I used to drive past it every day when I worked in Newham. They even have a little archive and museum about sugar : ) Sad I know but I was working for a Museum & Gallery service at the time. They are one of tha last places that still make a cone of sugar (large conical block that you need sugar snips to cut chunks off). Kind of taking the one lump or two rather literally. Check out St Lukes Church, Silvertown as it now has a music hall inside it. Have fun in the sunshine.