Ireland, who suffered a 2-0 defeat to England at their Dublin home ground in September, had gone into the break at 0-0, following some brave first half defending. However, their total collapse began just six minutes after the break, as Liam Scales brought down Jude Bellingham in the penalty area after a stunning pass from Harry Kane, earning himself a red card in the process after receiving a yellow in the first period.
Converted by Kane, the penalty ushered in a wave of England attacks, and a positive tsunami of Irish indecision. Just three minutes later a Declan Rice cross was cleared into Josh Cullen by Nathan Collins and fell to Anthony Gordon, who dispatched his finish into the corner on the volley to double Ireland's misery.
England's third came two minutes later, as a header was flicked on at the near post by Marc Guehi all too easily, and Conor Gallagher, waiting at the back post was able to apply the final touch. Jarrod Bowen and Taylor Harwood-Bellis compounded Ireland's misery by scoring number four and five, but Hallgrimsson will be ruing those six particular minutes after Kane's defence-splitting pass that saw his side played out of London.