Vasilis Barkas left Celtic permanently in 2023 after a spell that probably didn’t go the way he or the club envisaged at Parkhead. Brought in for £4.5 million at the beginning of 2020/21, the Greece international arrived at an unusual point in the Bhoys’ history. Scottish Premiership games were being played behind closed doors due to the COVID-19 pandemic. Undoubtedly, the campaign’s end result is a topic Celtic fans won’t spend too much time revisiting; however, the 29-year-old has rediscovered his best form since moving to Utrecht on loan in 2022 before completing a permanent switch to the E…