A Wise Man at Sinatra Family Forum 'Bob in Boston' corrected me: It's an English virtuoso Guy Barker playing flugelhorn. Thanks, Bob! And who's “Guy Barker” when he's at home? Someone with a very impressive Wikipedia entry:
Guy Jeffrey Barker, MBE (born 26 December 1957) is an English jazz trumpeter and composer.
After lessons from Clark Terry in 1975, Barker went on in the 1980s to play with John Dankworth, Gil Evans (with whose orchestra he toured and recorded in 1983), Lena Horne, and Bobby Watson.
Barker was a member of Clark Tracey's quintet from 1984 to 1992. As a sideman he has played with Ornette Coleman, Carla Bley, Georgie Fame, James Carter, Mike Westbrook, Frank Sinatra, Colin Towns, Natalie Merchant, ABC, The The, Haircut One Hundred, Erasure, Chris Botti, Wham!, Kajagoogoo, The Housemartins, Matt Bianco, Alphaville, The Style Council, The Moody Blues, Sting, Bucks Fizz, Mike Oldfield, Cleo Laine, Acoustic Alchemy, XTC, and Stan Tracey.
[Currently touring Europe with his own big band]
"More recently he has toured the Guy Barker Jazz Orchestra – a 15 piece big band . . . "