The hours of closure for the runways were about one hour for one, and two hours for the other.
Quite why BA, uniquely, then cancelled their entire short-haul operation for eight hours is ludicrous. Other carriers appear to have operated their entire programme through these hours. If cancellations really were required, then everyone can do them equally. The BA short-haul operation is not a trivial part of the Heathrow programme, it is a substantial proportion.
In passing, can we get away from those who parrot out "well done everyone" when there is gross disruption and/or an incident. A large number of pax were hugely inconvenienced all round, that is certainly does not merit any "Well Done" comment. "Well done" is when you manage to AVOID the inconvenience to them.