So long as BA have the capability to get all their Aircraft operating again prior to the end of slot protection (which is impossible). If they do then as long as they have the means to operate cash flow negative flights for an indefinite period in order to protect slots (Environmentally absolutely unacceptable in this day and age), which they don't. BA will lose all the slots from LHR down to the point that they have the financial where with all to maintain whats remaining.