By Sean Walsh & Graeme Bailey Brentford are confident that they will be able to keep hold of head coach Thomas Frank despite mounting interest in his services, 90min understands. Frank oversaw his 200th match in charge of the Bees on Friday, beating Brighton 2-0 to maintain their good start to the 2022/23 season. After four years in charge, Frank is firmly part of the furniture at Brentford and having led the club into the top flight for the first time in 72 years, his approval rating could hardly be higher. 90min understands that Frank has plenty of admirers elsewhere in the Premier League as…