Walker featured twice for Borough and scored in their 2-0 FA Cup second round victory over AFC Wimbledon.
He joined Watford from Middlesbrough this summer but has made just four substitute appearances.
Source: BBC Sport
Walker featured twice for Borough and scored in their 2-0 FA Cup second round victory over AFC Wimbledon.
He joined Watford from Middlesbrough this summer but has made just four substitute appearances.
Source: BBC Sport
