On 27 Aug 1979 Louis Mountbatten 1st Earl Mountbatten of Burma (age 79) was killed by an IRA bomb aboard his fishing boat in Mullaghmore, County Sligo. His daughter Patricia Mountbatten 2nd Countess Mountbatten of Burma (age 55) succeeded 2nd Countess Mountbatten of Burma. John Knatchbull 7th Baron Brabourne (age 54) by marriage Earl Mountbatten of Burma.

Nicholas Timothy Knatchbull (age 14) was killed.

Pauk Maxwell, a local boy, was killed.

On 28 Aug 1979 Doreen Browne Baroness Brabourne (age 83) died from wounds in hospital the day after the bombing.