Thank you again to everyone - I've got a couple of days off work (much needed, as today and yesterday were soooo busy) and am hoping to do a big fridge and freezer tidy up, although I also have to spend a fair amount of time at the dentist
I also want to go through - well, I would say the pantry, but it's just a big cupboard and doesn't justify that title!
Just to clarify, DP is back at work now, it was the unexpected couple of weeks off work that threw us. His job is mainly on construction sites and whilst the work is usually continual, for some reason there wasn't anything available and he was at home phoning round to find something! He's hoping now to work through until almost Christmas, back first thing in the New Year; he's usually out of the house 6am - 8pm though when he does work and often works Saturday too, so still a lot of the cooking/ cleaning/ childcare falls to me...
I'm trying to reply to everyone but please forgive me if I miss anyone out! Thank you to @NC10125, @Meadowfinch, @steponacrackbreakyourmothersback, @Autumndayz77 , @Cerialkiller, @mitogoshigg and @mathanxiety for the meal planning tips, very useful 
@suki1964 I'm definitely going to try to stock up on cheap veg, we're lucky enough to have a chest freezer which obviously is great in many ways, but also means some things stay in there for much, much a bit longer than they probably should...
@Gruach thank you for the link to the veggie site, very interesting!
@AllTangledUpInTinselAndTiaras thanks for suggesting the chicken + sides, chicken is pretty much the only meat I think they will all eat, I'll probably have to go with some form of that! @Phase2 I'll definitely look at the turkey for DTS2 as well as he enjoys turkey, something simple to carve like that would be good for him.
@Pineapplewaves we maybe eat out once a week at the moment at a local cheap & cheerful cafe, mainly because the DC have sports clubs which we can't get home to eat between the timings! I would love to go out for Christmas dinner - there's an Indian restaurant nearby which is doing a good deal - but can't really justify the cost, especially as DTS1 wouldn't eat anything
we usually go to MIL's house for Christmas dinner as she actually enjoys doing dinner, but this year she's away having a well deserved break.
@Thatsinteresting if it was up to me I'd definitely eat pizza
I will get some in just in case and some little treats too!
@beetr00 and @OldTinHat I'll hopefully get to book an Iceland delivery too, thank you for the tips 
@ODFOx we don't have a specific budget, just trying to keep it sensible and not overspend so there's some left over for trips out, etc - we have Aldi, Tesco and Sainsburys locally, plus a small Asda and Iceland. I'm going further afield tomorrow to visit Lidl, such excitement!
@Bjorkdidit we're not at the point of using the food bank yet (I always donate what I can as I know there's people a lot worse off than us), but I've put an early morning trip on 23/12 in the diary, great idea.
@greengreyblue I love Christmas pudding, that is definitely on the shopping list!!