Most of the Karate folks I've met have practiced Wado Ryu (it is a particularly popular style in the UK and Ireland too). The reason for its popularity in Europe and beyond was largely down to Tatsuo Suzuki, who sadly passed away on 12th of July this year. I'm not a Karateka but I thought I'd make this post as some folks have in the past expressed admiration for his work as a karate teacher and indeed a few people on here have claimed to train with him.
A brief interview from the man:http://www.wadokai-manchester.org/Interview_with_Tatsuo_Suzuki.html
"Let your food be your medicine, and your medicine be your food"