A variety of links are shown below. The comments are my own opinions from experience of dealing/working with each one.
Courses and Tuition
www.spanglefish.com/gloucesterartsandcrafts - home of the annual Gloucester Summer School.
www.westdean.org.uk - College offering the very best in arts and craft tuition.
www.restexpress.co.uk - finishing materials, adhesives, bandsaw blades etc.
www.yandles.co.uk - timber and tool supplies. (you can choose your own planed timber!)
www.formerglory.co.uk - the best people for seating materials!
www.windsorchairresources.com - american chairmaking site giving a huge amount of info/ideas
www.woodworkprojects.co.uk - japanese saws.
www.heritagecrafts.org.uk - a relatively new site promoting, encouraging and preserving crafts in the UK.
Chairs for Sale
www.themalthousecollective.co.uk - antiques, furniture etc and a 'maker's gallery' featuring some of my chairs and stools