Oasis rockstar Noel Gallagher was spotted taking in the high-stakes Manchester derby at Old Trafford alongside his boys, with cameras later catching his 15-year-old son, Sonny Gallagher, mocking home supporters by giving the middle finger on live TV after Erling Haaland’s breakthrough.Seated in the stands at the 62-minute mark alongside 18-year-old brother Donovan, young Sonny lost his composure as the ten-man visitors celebrated the controversial 1-0 winner.