Jeff,here`s a couple of websites that may help:
1)
www.craft-guild.org
This is the Craft Guild of Chefs,a U.K. based organisation that is involved in loads of competitions.
2)
www.caterer.com
This is Britain`s leading catering magazine,this may be more useful as the publishers sponsor competitions. There are chefs who subscribe to this magazine who regularly take part in U.K. and European competitions.
I hope this helps you find the information you require,Leo.