Found it on AEK's official website too - https://www.aekfc.gr/newsdetails/odigies-pros-tous-filathlous-gia-to-braiton-130592.htm?lang=el&path=-531655046
Just found this on the AEK forum (courtesy of Google translate) : http://forum.aek.com/viewtopic.php?f=34&t=27496&sid=05f32c535a95cf488d221f9aef43ea19&start=120
AEK FC: Instructions to fans for Brighton
AEK FC informs that all our fans who have purchased tickets for the match against Brighton...