I don’t know when exactly but he has said in an interview somewhere (will look for the link now) that this year he’s concentrating on Good News and he’ll be touring again next year.

But here are some links to keep an eye on for any changes:

http://www.russell-howard.co.uk/live

http://www.ticketmaster.co.uk/Russell-Howard-tickets/artist/33670

http://www.tvrecordings.com/shows/view/267

http://www.ents24.com/web/artist/28681/Russell_Howard.html

http://www.seatwave.com/russell-howard-tickets/season

http://tickets.telegraph.co.uk/russell-howard-tickets/

http://www.stereoboard.com/russell-howard-tickets

Hope that helped :D