This question was answered on 2nd April 2019
As the then Chancellor said at the time, the government agreed in 2010 to provide a bilateral loan to Ireland because it was overwhelmingly in the UK’s national interest to have a strong Irish economy and stable banking system. The links between our financial systems, particularly in Northern Ireland, mean that there was a strong economic case to provide financial assistance to Ireland. By being part of the international financial package, the UK indirectly supported the very many businesses across the UK that trade with Ireland.