However, a saltire now flies in its location after the 24-year-old striker decided to signify Scotland instead.
His mom Frances yesterday admitted the whole family has changed allegiance and will be backing the Scottish group in the Battle of Britain tonight.
Miss Adams told the Mail:'I will be supporting Scotland, of course. I don't have any option and I'll be willing them to beat England 2-1.'
Her son is one of the three Scottish players at the Euros who were created in England.
McTominay's uncle Robert Bell, 68, said the family is captured in'an agony of indecision' over who to support.
He explained:'I, for one, will probably be rooting for Scott while needing England to win. We're caught down the centre and it's a very awkward place to be.'
Adams, who was born in Leicester, played twice for England's under-20 side in 2015.
After rebuffing a strategy from Scotland in 2017, he switched allegiance this year. The striker has confessed his teammates in Southampton have started calling him McChe or McAdams.
He qualifies for inclusion because his adoptive grandparents were Scottish.
Miss Adams, 60, said:'I supported England when Che played with the team but now he's playing Scotland I support his nation .'
There was no sign of flag in McTominay's family home in Lancaster yesterday.
The Manchester United midfielder, who had been signed aged eight by then manager Sir Alex Ferguson, qualifies for Scotland because his father Francis was born in the coastal village of Rhu. His mother Julie is English.
Meanwhile, the Leeds United captain Cooper is eligible to play for the team because his paternal grandfather John hailed from Bo'ness, near Edinburgh.