For just 7 a/c once per week thats £43662 per annum
To that you need to add the duty hours lost by the crew
The opportunity cost of customers shunning BA & LL for the smaller airports and LoCos(costs BA & BAA)
The opportunity cost of the delays to other BA flights (other aicraft, and delays to the next sector on those aircraft)
There are probably other costs, less tangible perhaps, that I have missed
I am ex-mil, PPL and regular SLF and have all but shunned Heathrow for this very reason. It doesn't take very long after landing to be disembarking at Luton, Stansted, BHX and East Mids that I use instead.
I am using BA from LL in July for a holiday, so am not looking forward to the return trip! If a delay does occur, I will make sure that feedback is given to the appropriate quarter!
Thanks for the insight chaps