Spitfire 01234
Pprune buddies are correct. Your analysis might show that Heathrow does not have a capacity problem......only an operating problem. A third runway won't help much either and for your project you might examine the need for an additional runway against the under-used capacity of the two that are already there. You have to think "outside the box".
Here is a little something to think about on a slightly different topic.....If the ILS glidepath angle was increased by half a degree it would save a billion tons of CO2 and cut noise by half [I made that up, but official reports can be written to promote any pre-conceived outcome.....beware....think for yourself.....let us know what you think]
By the way, if you want to see slick operations you need to go and watch military ATC. The mil guys are experts at their craft. When there were F 1-11's at Upper Heyford I watched 73 get airborne in 35 minutes for exercise Salty Hammer 86.......and when they returned they were all on the ground in well under an hour.