I would like to say that, as a 100% true Brit, I take great exception to the stereotype that British food is pants. Unfortunately, I am unable to do this as not only am I the world's worst cook, but I consider sultana bran to be the ideal meal for every occasion!
I have also had the very unfortunate pleasure of eating out in numerous "culinary" establishments in the UK and can vouch that the stereotype is, for the most part, very well deserved.
A portion of food in Britain (and even moreso in England) is generally no bigger than the size of your fist and a side salad will usually consist of one piece of wilted lettuce, one transparent sliver of cucumber (best left to dry out overnight) and two slices of over-ripe tomato (that's tom-ah-to, not tom-ay-to!).
Even if the food is predictably inedible, the British diner will unfailingly say "It's lovely, thank you" in the unlikely event that the waitress gives a damn enough to even ask.
However, don't let me dissuade you from ever sampling our lovely cuisine, for it truly has to be sampled to be fully appreciated.
There, are of course, always exceptions to the rule - however these are usually very nice little Italian, Indian or Chinese restaurants as good old British food generally consists of lard, potato, or very fattening desserts!

Thank God I'm over the other side of the world at the moment - and it's all just a distant memory!

Incidentally, Vegemite is the food of the devil. Marmite/Our Mate (as it's called over here), is far superior ... (ducks a punch from Tlkiwi!).