The Minister for Transport has acknowledged that there is pent-up anger about Aer Lingus' chief executive Christoph Mueller's pension arrangements.

However, Leo Varadkar said the dispute at Aer Lingus is due to a long-standing issue about rosters.

Speaking on RTÉ's Morning Ireland, Mr Varadkar said the Government had voted against Mr Mueller's remuneration package but had lost that vote.

He said the Government did not control Aer Lingus and this was something that needed to be understood better by Aer Lingus and the public.

Mr Varadkar said he still had confidence in Mr Mueller and that he was an excellent CEO.

He said Mr Mueller had done a great job in Aer Lingus, but that was not to say he always got it right.