This page may contain some useful links for unicycle hockey and unicycling in general.
Cardiff - http://www.cardiffunicycle.co.uk/
Cambridge - http://www.camunihockey.co.uk/
www.unicycle.uk.com - a great source of unicycles and spare parts. If the guys who run this don't know about it then it doesn't exist.
The Union of UK Unicyclists encompasses all disciplines of unicycling within the UK. Its a useful resource for discussion groups and also contains some information on unicycle hockey.
The International Unicycling Federation is an international organisation for all things unicycling. They actually define the parent rules for unicycle hockey.
Eurocycle was much loved by many. We had some great times there. Here is a link to its website which hasn't been updated in a long time:
Unicon is the world get together for all things unicycling and it usually runs every 2 years. Its in its 16th incarnation at the moment and the next one is in northern Italy this summer. It includes all disciplines of unicycling and also unicycle hockey. Its a great place to meet other unicyclists, have some fun and learn some new skills.
older Unicon web sites:
Unicon 14 (Denmark) - link not working