That's very disappointing and also a coincidence as I was listening to Dereks' playing on Gov't Mule's Worried Down With The Blues on the way in to work this morning. I remembered seeing Derek (with currymandavid) in April this year and wondered if he'd be coming to Europe again next year.
Sad that we won't see him but next year, but I'm sure there'll be lots of other great gigs to occupy our time, especially in May.
I wonder what Derek will be doing with all that spare time? 
Phil
Ars Longa, Vita Brevis
“The guy who has helped the blues industry the most is Joe Bonamassa and I would say he is more rock than some rock stuff, so to me blues is whatever you want it to be!”
Simon McBride in my interview with him in Blues Matters! Issue #56