I agree that it is not either but the actual song is sang at rugby grounds till this day and a bastardised version is sung by Liverpool fans.
'"It's a privilege to score my first goal for my country, so yeah, I'm buzzing!" 🗣️@NorthernIreland's Conor Bradley speaks after scoring the winning goal for his side against Scotland 🟢':-https://twitter.com/ViaplaySportsUK/status/1772745036284719211 (2 minute post-match interview)Scotland 0 - [1] Northern Ireland; Conor Bradley goal on 32' - https://v.redd.it/cyo1gpt4mqqc1 & https://twitter.com/ViaplaySportsUK/status/1772721091523367094