The food science course at Nottingham is at the Sutton Bonington campus (unless they are changing it now the vet school will be out there.) You will get *very* mixed opinons on this campus!! Some people love it and others, probably the majority, hate it. It is about 12 miles from University park and is very isolated. There is a hopper bus between the two campus, which is the uni say is very frequent, it isn't!! They are about every hour ish, but thery are sometimes full and you will have to wait another hour. If you live on campus there are no buses at all on bank holidays, and they are very irregular at weekends. There is a very small shop on campus, no cash machines, a bar and small cafe thing. The nearest small shop is kegworth (30min walk) or loughborough/nottingham for supermarkets.
I havn't found the facilities to be very good at this campus (for lectures etc.) Because it is small, and there aren't many people there, they put all the first years together for nearly all the lectures. Which means you have a huge range of courses doing the same module. You have people doing food science and nutrition courses with agriculture and animal science people and plant science etc. I am doing ANIMAL science and had to do modules about food (for humans,) going crop plants etc. Similary people doing food sci, plant sci etc had to do modules on animals.
The univeristy park campus is lovely, but don't go to nottingham for that reason, you really need to try and research SB abit!! It looks like a nice campus, and is some of the time, but as I said, it is very isolated. A taxi back from UP to SB will cost you about £20 or more if you are coming from the centre of Notts, so it doesn't make for a cheap night out!!
I don't know leeds at all, so I can't comment on that, but it is worth comparing the two.