Goodness, calm down people, these are still young children.
Pyjama pants are what night time pullups for older children are marketed as.
Dont tell the kids off, they really cant help it, but you do have my sympathy.
The pull-up/PJPants people make disposable half bed sheets, which go over the top of a normal bed sheet, so its easy to change in the night if necessary, and they are available in Boots and supermarkets (bigger branches)
I’d get some water proof covers for the beds as well, again supermarkets.
PJPants are sized 4-7 and 8-15 i think..so depends upon the height and size of said children.
Get thePJ pants, PJ sheet and waterproof sheets, and life will be much easier for the week.
Changing two beds a night is not fun.
But be lovely to the children, as no matter how irritating it is, its really not their fault, or anything they can help. Chances are they will grow out of this in a year or so, but in the meantime, its embarassing for them too, so dont make any fuss.
The attitude of some posters is very unkind.