Let's also take a moment to reflect on BRs record in European competitions.
Liverpool:
2012/13 - beaten by Zenit St. Petersburg in first knock out round of Europa League
2013/14 - did not qualify for Europe
2014/15 - knocked out of Champions League at group stage (by FC Basel). Went into Europa League and lost in first knock out round by Besiktas
2015/16 - two draws in Europa League group before being sacked
Celtic:
2016/17 - finish bottom of Champions League group, including 7-0 defeat against Barcelona
2017/18 - finish third in Champions League group, going into Europa League. Knocked out by Zenit St Peterburg in first knock out stage
2018/19 - failed to qualify for Champions League (beaten by AEK Athens). Qualify through group stage of Europa League but beaten in first knock out round by Valencia
So, six attempts and he's never got past the last 32 of the Europa and never qualified through a Champions League group.