I haven't made Delia Smith's pudding recipes, but I made two of her fruitcake recipes a couple of years ago and they were smashing (and one could get smashed eating them). I didn't have too much trouble with the terms and units, if I recall; it goes better if you have a good kitchen scale. So one American was able to figure it out!

And the fruitcakes should be 'fed' too, weekly... just pour a little booze on them and wrap them up again. I used rum that year; next time I might try Irish whisky.