Gillingham’s weekend goalscorer Euan Williams is set for another appearance on Tuesday night as the former Charlton youngster seeks a new club. Williams signed his first professional contract at Charlton in 2020, having been under the watchful eye of the Addicks’ former academy coach Anthony Hayes, who is now assistant boss at Gillingham. The attacking midfielder, 21, had been with Charlton since the age of nine but was released this summer. He played an hour for the Gills on Saturday, scoring the opening goal in a 2-0 win over Watford and having a couple more chances go wide during a lively p…