mobilesphonesdirect.co.uk ?

They seem to have very good deals and according to their website are "What Mobile" Best Online Reatailer.

Interested if anyone has good/bad experience.

Just make sure they have stock! I preordered two iPhones, a 6 and a 6plus. 6plus came 4 weeks after launch, 6 they still had no delivery date for 6 weeks after launch and I could have walked into local apple store and bought one!

I got one from second-handphones.com and would do it again. It arrived super quick was supposed to be rough condition but was actually pretty good and came with a self addressed courier bag to send it back in 7 days if I wasn't happy with it. If memory serves me correct it had no charger but they advertised it as such.