TB - not sure if you're joking, and in any case nutrition is a very individual business, but if anybody's really interested my strategy is: 1) start eating small amounts regularly (every 30-40mins) of flapjack/nuts from early on (1hr in) 2) when I start to actually feel hungry (usually about 3-4hrs in) have first pork pie, then one every couple of hours thereafter 3) continue to mix in flapjack/nuts but also add in bounty bars for quicker available sugar 4) constantly think about what to eat next - anything I think I can face at any given moment, eat that! 5) in latter stages/home stretch/when I can't face anything else, eat jelly sweets.
in the case of Bullock there's all the checkpoint food to chuck into the mix too - rice pud/fruit cocktail at Edale, banana/crisps at Peak Forest, soup/bread at Miller's Dale, doughnuts at Chelmorton, crisps at Earl Sterndale, cake at Cumberland Cottage, plus tea/coffee at every possible opportunity :y
I also carry little baggies of sport-drink powder to make up at CPs so I've always got the choice of pure water or sugary water to drink (carry 2 bottles)
you need to vary your sessions within each week, not just do the same thing 3 times eg:
one intervals session - like you're doing is OK for 8-16k training, faster 1k reps for 5k training and even faster (say 3min) reps for 12 min test
one steady run - run a sustained distance/effort (faster than a jog, but without going mad) (build up to 30-40mins)
one long run - build up to running at least 12-15k in one go, but at an easy jogging pace - although tbh your long weighted "tramps" should give you mostly the same effect if you can't fit this in as well (in that case just jog (as slow as you like) for as long a time as you have i.e. an "easy" run)