There's not really a distinction, domination doesn't have to incorporate any S&M factors at all. If you're not into pain play, or only like spanking, or just like it light as more sensation than outright pain, or want to full-on flay your partner til they bleed, it doesn't change the sub/Dom dynamic. That's why it's important to discuss limits before getting into anythign with someone, because it's impossible to just know by what label they use. As long as there's an element of control, it counts, whether or not it incorporates S&M, sex, punishments, or whatever.
Hard to give ideas without knowing specifics of what you'd be into, but in general looking at the Bondage Boutique range is quite good - http://www.lovehoney.co.uk/brands/bondage-boutique/ - and there's even a special offer on them at the mo, free bondage tape with every £25+ you spend, which ain't bad.