He complimented its "bright instrumentation" and "a superb vocal arrangement" that gives the song a "fresh appeal". Paul Mathur from Melody Maker wrote, "Nail is about an inch away from brilliance and is therefore a failure. Life's tough. It starts with spoken bit that echoes Kevin Rowland of all people and there's a bit where the girl says she loves him and he mumbles, "she's lying" with a throwaway magnificence. Then it all goes horribly wrong and the bargain bins rumble menacingly. The video stars the most beautiful girl in Britain though so set your timers." Pan-European magazine Music & Media noted that from BBC detective series Spender actor Nail "has now started spending time on the top slot in the UK singles chart. The spoken verses and sung chorus together make a nice pop/dance tune in the no man's land between Jason Donovan and Simply Red." Newcastle Journal described it as a "mournful song [where] he sings and talks". Track listings 7-inch single A. "Ain't No Doubt" – 3:57 B. "What Can I Say" – 4:29 UK and European CD single "Ain't No Doubt" (7-inch version) – 3:57 "Ain't No Doubt" (Lies Remix) – 6:11 "Ain't No Doubt" (Damned Lies Remix) – 4:45 "What Can I Say" – 4:29 Charts Weekly charts Year-end charts Certifications References 1992 singles 1992 songs Jimmy Nail songs Male–female vocal duets Songs written by Charlie Dore UK Singles Chart number-one singles