Don't you have a compost bin? The pumpkins will make excellent compost.
Our local green bin policy is that "kitchen waste", i.e. veg. peelings etc. don't go in. The green bin is for hedge trimmings, grass cuttings, weeds; the rest goes in the compost. My compost bin is my old dustbin, with a few holes cut in it. Left to rot down with the addition of the "secret ingredient" it makes lovely compost within 12 months. The secret ingredient, if you really want to know, is human urine (anybody's will do). I used my own compost when I laid a new lawn last year and it took off like a rocket.
Move the pumpkins to a compost bin, or a heap if you don't have a bin, and keep the Council and your garden happy.
