The William Hill Greyhound Derby continues this week, with the second round heats taking place over Thursday and Saturday.Racing Post Greyhound TV's Jonathan Kay joins Mark Walton to firstly look back at the opening round and discuss the revised Outright market.They then move on to some of the specials on the William Hill website before Jonathan offers his best bets for round two.Enjoy.http://serve.williamhill.com/promoRedirect?member=audiobooUK&campaign=DEFAULT&channel=will_horse&zone=1474273946&lp=0