Ball, of course, evokes memories of the Trad boom of the Sixties when he was a key member of a triumvirate completed by Chris Barber and Acker Bilk. Those with memories long enough will recall hit recordings like Midnight in Moscow, Samantha and So Do I.

This year marks the 50th anniversary of his band and despite one or two brushes with ill health he is still a jaunty leader at the age of 78. More than 150 dates a year confirm the remarkable durability of a trumpeter whose enthusiasm remains boundless.

Kenny and his rumbustious Jazzmen open the festival on Sunday afternoon to be followed in the evening by Martin, who is peerless in this country as a stylish interpreter of old and new songs. Her accompanists are Gareth Williams (piano), Steve Watts (bass) and Dave Ohm (drums), and there will be support from the locally based Laurie Briggs Quartet.

Big City Jazz continues on Monday with afternoon-to-evening music marshalled by DJ Gilles Peterson who headlines a cutting edge bill including the Neil Cowley Trio, the Joel Purnell Quartet, the Lewis Express and Steve Parry's Big Band from Hell. There will be festival fringe events at Harvey Nichols, the Sela Bar, The Wardrobe, the HiFi Club and the Radisson SAS Hotel.

Meanwhile, Ilkley's Summer Festival continues tonight with an appearance in the Kings Hall by Clare Teal, a singer of endearing quality who relishes performing in Yorkshire, as she was born in Kildwick near Skipton.