English Greyhound Derby finalist King Memphis is set to reappear at Central Park Stadium in October when the Sittingbourne venue hosts the Premier Greyhound Racing Kent Derby. Trained by Ashford couple Elizabeth and Rab McNair, the talented two-year-old finished sixth in the English final at Towcester after missing the break and struggling to catch eventual winner De Lahdedah. The son of 14-times open race winner Queen Beyonce, King Memphis will now be aimed at Kent’s premier competition this autumn having finished second to kennelmate Queen Joni in Central Park’s other major final – the Arena…