Celtic's preparations for their crunch midweek Champions League qualifier against Midtjylland took a knock with a 6-2 friendly defeat by West Ham at Parkhead. Hoops skipper Callum McGregor curled in an early opener before Hammers striker Michail Antonio scored a quick-fire double and captain Mark Noble netted from the penalty spot. Ryan Christie pulled a goal back for Ange Postecoglou's side five minutes after the break but Said Benrahma replied for West Ham and Celtic then made 10 substitutions before Jarrod Bowen and substitute Armstrong Okoflex, signed from Celtic this summer, added two more.
The use of vaccine passports could also be extended to lower divisions and other sports.
The 42-year-old Irishman stepped down at League Two Dale after two years in charge last month.
He made 46 Premier League appearances for Southampton, scoring two goals.