Pete Allen Jazz Band at Donnington Valley Hotel on Sunday, September 8 Review by DEREK ANSELL What’s this? The Pete Allen Band without Pete? That’s a bit like strawberries without cream or Ant without Dec surely? It happened though that the leader went off on holiday and sent the latest, seven -piece edition of the band for this month’s gig in Newbury. Trombonist Roger Marks slipped on the leader’s hat and kicked off with Ain’t She Sweet, featuring James Clemas at the keyboard also as vocalist and himself on choppy trombone. The next selection was the less well known Give Me Your Telephone Num…