This chart shows the number of emergency incidents in the Republic of Ireland and Northern Ireland which required paramedics to cross the NI/ROI border to provide additional support. The data is from October 2015 - when ambulance data in the Republic was first collated in electronic format on a centralised database - to March 2018. The Northern Ireland Ambulance Service attended 221 cross-border emergency calls in the Republic while their counterparts in the National Ambulance Service responded to 132 incidents in Northern Ireland during the timeframe. See also the chart 'Ambulance Call-outs from Northern Ireland to the Republic (by county)' in our Data Guide Brexit.