Tax form W8-Ben - USA -UK tax treaty

anu15 Confirm Email, Member Posts: 2
I reside in UK, and will be starting as a contractor for a US based firm for software work. What USA-UK treaty paragraph should I mention in from W8-Ben for 0pc tax with holding? I have taken a look at the treaty, and am confused between article 12 (Royalties), and article 14 (Employment). Please advise which article to cite for 0% tax with holding?