Thanks, aSilver, BALD and LisaD.
To reply in general: I have pretty good relationships with all my parents, some obviously better than others. Regarding the little one (well, 5 yr old), I have had her with me for years and she appears to have become more fussy as the years pass. Her mum is well aware of her fussiness and is very supportive, and certainly would not think that I am not feeding her!
I find it frustrating that, knowing the child likes for example cheese, yogurt and pita bread, I provide this. However, she does not like today's cheese (ordinary mild cheddar) or yogurt (munch bunch) or pita bread (wholemeal). So I ensure that I provide the things she likes, but then brand fussiness rears its head!!! And that I am not prepared to pander to.
I provide all food and either have a written or mental note of what all my children like when I shop (be it online or in store). And I often ask them specifically what they would like. So it is not as if I am providing completely unlikeable stuff!
Not sure that I can do much more, though I do like the idea that you have, Lisa, of providing a copy of the menu to parents the week before. Not sure I have it in my bones to be that organised, though!
Thanks again for the advice and support.
I also ask the children what the like and of course I provide a variety of things at each meal, but it does seem to be the same thing over and over: sandwiches, pasta (often with NOTHING on it!), cucumber, red pepper, etc.