You can open one of these accounts for a free 3 month trial. You are tied into a 12 month contract with Sky but Natwest do not notify Sky if you close your bank account with them.
www.natwest.com/microsites/personal/advantage_gold/av_gold_benefits_leisure.htm?affiliate=true&CMP=A FC-UKesalesAffiliates&P36=ASQR2A&PURL=skytv.at/hotukdeals