The Official UK Charts Company is having a poll to decide which is the best British #1 ever. You can vote for any number of songs with a maximum of 50. It looks like this poll is monitored, so cheating will not be too easy. Let's show there are enough fans to give Elvis a good score!
A less worthy poll is done by UltimateCharts.com. You can revote every 24 hours for your favourite album or song, but since there are always people that have nothing else to do... Elvis is in the album list, but you have to press the next button several time. At the moment of writing he was at 142 with his first album. But then again, Elvis was always a "single" artist, and that shows. In the single list he is twice in the Top 50, at #1 with "Heartbreak Hotel" and on #50 with "That's All Right, Mama" (?!).
Source: Email / Updated: Jan 2, 2001