Hey Scraggy
Do you get such a thing as Ensure Plus over where you are (don't know where you are as you haven't set up a profile page yet)? Ensure Plus is a complete meal in a milkshake. Strawberry is the best flavor, but you can get them in many flavors.
Ensure Plus kept me alive for about 6 months prior to my op as I was unable to eat solid foods for most of that time. I swear by the stuff....
It's best to stay away from gravy mixes, dude, especially if it has cornflour in it to thicken it. It has the potential to stodge things up a bit. I doubt the bread will be doing you any favors either. Did you get any information on low residue diets from your consultant?
Also, if you are having troubles with your transit time being a bit too quick, ask your consultant about taking supplements and whether it may be a good idea to grind them up before taking. If you get the go-ahead for the supplements, be sure to check the labels to see if they have either bone meal or Dolomite in them. If so, don't use them because the bone meal will have a tendency to constipate you, and bone meal and dolomite tend to come from animal bone which has a tendency to contain significant amounts of lead, arsenic, mercury, and other potentially toxic metals. Not quite what an already tender bowel needs to cope with.
Take care, Scraggy.