Thanks everyone and urgh, yes, it quite literally put me off my supper tonight! And forgot about Downton because of the wretched things!!
Have the Nitty Gritty comb and two different types of shampoo I got from chemist. DD has gone to clean bed/clean sheets with beautifully shining locks as nit-free as anyone could humanly get them, having put her through 2 lots of medicated shampoo (one you leave on for 2 hrs and one you leave on for 10 hrs), 2x 1 hr combing with metal comb and conditioner and three vinegar rinses! It's been a very long day!
Dh and I have both treated ourselves too just in case and have changed our bed sheets as well. We both have short hair so hopefully have escaped them but not taking any chances, oh no!
Have also plunged all brushes and combs in to a boiling hot Dettol bath.
Sod's law dictates of course that we had only changed bed sheets a few days ago and I was just up to date with laundry but now working through huge pile of bed linen, towels, dressing gowns, sofa covers, clothes, soft toys, coats, jumpers, fleeces, .. you name it ... it's in the wash pile (or in the freezer!).
Yurgh and double yurgh! DD has only had them once or twice in 11 yrs when she was an infant (and even then I wasn't sure and treatment was preventative rather than in response to anything definite) so this has come as a bit of a shock! Really don't know how I managed to miss them because I tie her hair up for school every day and I'm doing ballet bun's all the time and plastering her head with hair spray in the process! And her hair is fine and straight, not particularly thick. Plus I help her wash her (long) hair twice a week. Honestly didn't notice anything at all until this morning...
!!
[Louse-inspired rant over!!]
Nowt else achieved today except I made minestrone soup with tiny meat balls which no-one liked [sigh]
You sound very organised Blue and happy birthday to your dh tomorrow!
Congrats on humungous list Jemima
Take it steady Engels
Nicknacks - all the better for repelling nits
and it will grow! 
Big waves to Vivacia, Alice, Threeislovely Swan, Toffee pushme whoknows and everyone else!
G'night all!