Oh well, seeing as no-one else put in a bid, I bought it myself.
The programme says the Speedway XI was formed in 1958 and the players for that afternoon's match (22/3/64) would be chosen from the regular players: Gerald Jackson, Ron How, Reg Trott, Barry Briggs, Cyril Maidment, Ove Fundin, Ernie Baker, Viv Harwood, Jim Heard, Roy Trigg, Jim Tebby, Danny Dunton, Pat Flanaghan, Bob Andrews and D. Boulter.