Point of order if I may: What is commonly known as 'Scope' applies ONLY to BA owned and operated aircraft (of 100 seats or more) flying to/from LHR/LGW. It most definitely does NOT apply to the 'brand' - see BA Cityflyer or Open Skies. Nor, crucially does it apply to 'slots'!!!
Much yet to play out here I fear!!!
PS: As we all know, IAG have chosen to totally ignore Iberia's more binding Scope clause regardless! I see no reason why they would behave differently in London, should they decide it was in their interests so to do!
Scope is dead. Safety in numbers is the only game here.