The group chief executive of G4S, Nick Buckles, remains in his post on Friday after two directors quit in the wake of a review into the company's Olympic Games contract.
G4S's chief operating officer David Taylor-Smith and global events specialist Ian Horseman Sewell have quit.
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Immigration levels may need to rise, David Davis has said as he refused to commit to a cap on the number of EU citizens coming to the UK.
MSPs are expected to back Nicola Sturgeon's call for a second independence referendum in a vote at Holyrood on Tuesday.
Adele has said she may never tour again after saying she was "not good" at it and she feels "vulnerable" on stage.