Greg Abate spends part of each summer in the UK, where, like Alan Barnes, he's very involved in jazz education. I saw them in a very entertaining gig at Wigan in 2009.
I forgot to mention this additional aspect of Barnes' activities. He himself is a product of Leeds College Music's Jazz and Light Music course, the first jazz education course in the UK and I saw him doing his bit for today's students last year in Manchester when he led the Royal Northern College of Music's big band through a concert of Basie numbers after a weekend's tutoring.
First time I heard of Alan Barnes he was in Tommy Chase's neo-bop group. That must have been around the early 80s.
Notice that Greg Abate is in the lineup for Swanage this year. He appears there quite regularly - often in tandem with Barnes.