Ireland opposition calls on Dublin government to refuse to sell its 25% stake and effectively block latest IAG offer of £1bnAer Lingus is set to fly into a political storm on Monday by accepting a £1bn takeover approach from the owner of British Airways.Directors of the Irish carrier are expected to finally recommend a bid from International Airlines Group, which made a third offer valuing the Dublin-based company at around €1.3bn (£1bn) at the end of last week.