Elvis did make number one this week in the UK, on the 12 inch vinyl singles charts. According to OCC data it sold 5,016 copies - this is despite the fact that it is a 10-inch single and was supposedly limited to 5,000 copies in this format.
Also "That's All Right" is the only chart single not to appear in the UK Top 50 Radio Airplay Chart. The number one tune from Usher enjoyed 2,222 radio plays and 505 TV appearances, Britney in the second position racked up 2,018 spinning and 377 television screenings on the music channels. Elvis had a mere 97 radio plays and no music television support, so whilst the overall sales might appear grim, almost 20,000 fan club members did make the effort and buy the single.