These charts shows the quarterly average Euro/Sterling exchange rates taken from the Central Bank of Ireland and the Bank of England. It shows a strengthening Pound in 2014/2015 with a subsequent weakening into 2016, followed by a marked change in Q3, 2016, sparked by the UK referendum decision to leave the EU. Sterling continued to fall in 2017, however the first quarter of 2018 shows a slight increase for the Pound/Euro exchange rate.
These charts shows the annual average interest rates for Ireland and Northern Ireland, noting the sharp fall since 2008 and record low rates for 2017. Data sources: Central Bank of Ireland and Bank of England.