Doing Freelance Work in Another Country

Hi all,

I'm considering moving to the UK from Canada or at least visiting there for an extended period.

My question is whether anyone who is not a UK citizen has experience doing freelance work in the UK. What are the rules for whether I'd need a work visa and that kind of legal stuff? I've found it hard to find information on the rules for being a freelance worker who is not a UK citizen.

I don't intend on working for a UK business. In other words, I wouldn't be taking a job while I'm there. I would just be working with my existing Canadian clients and finding more through online freelance sites like odesk.com and such.