Someday between march 12-17.
The only information so far on SXSW's site is:
Sharks,Leamington Spa, UK and a hyperlink to my tumblr fuckyeahsharksband.
Source:
http://sxsw.com/music/shows/2013-bandsCrowns will also play in Austin btw.
Great news indeed for the american fans! I mean why traveling all the way to Austin for one single show when you instead can take the opportunity to do a tour with a new album coming up?