Stalls handler had used syringe in hand before start of Wolverhampton race

• Incident in 2014 raises fresh concern over racecourse security
• Arena Racing Company says handler was given verbal warningA stalls handler produced a used syringe from his pocket as the runners approached the starting stalls moments before a race, the Guardian can reveal.The incident, which raises fresh concern over racecourse security, happened at Wolverhampton in early 2014 and was dealt with quietly by the Arena Racing Company (ARC), on the grounds that the handler concerned had