Here are some of my favourite sites about the Raleigh Twenty:
1. Fabulous Raleigh Twenty to Life site.
2. Sheldon Brown's pages which I am sure are responsible for causing a number people to develop Raleigh Twenty addictions!
3. The history of the Twenty by Tony Hadland.
4. A super site by Hartley Martin collecting information from many Raleigh Twenty owners round the world.