Barrington reminded investors that the European Commision denied Ryanair's previous bids for control of Aer Lingus on the grounds that the buy would leave a single group in control of over 70 percent of the Irish air travel market, Dealbook wrote. Ryanair has indicated its willingness to give up some of Aer Lingus' slots at Heathrow in order to avoid the monopoly concerns, but Barrington said the loss of the slots would hinder Aer Lingus' future. Competition regulators in Britain are already examining whether the present 29.8 percent Ryanair share in Aer Lingus itself gives Ryanair too much sway over the Aer Lingus business plan, and thus the Irish air market.