We have food recycling here in Oxfordshire, a green bin in our case. the food does have to be in biodegradable bags, but we have to supply buy the bags ourselves. All the local supermarkets sell them.
But even after all our rubbish has been sorted; vegetable matter in compost, food waste in special bin, recyclables in another bin, there is still a residue to go to landfill and for that I need a bag with handles to hang on the two hooks on a kitchen cupboard door. Up to now I have relied on the few carrier bags I got occasionally, plus generous donations of bags from both DC.
However since tanith's first helpful link I have also been on ebay where I found I can buy handled bags for considerably less than the supermarkets charge.
We also have a house in France. There we are expected to recycle a lot more than just glass; all glass, food packaging and paper has to be deposited in special recycling bins in the village centre, no doorstep recycling collection. For household rubbish the Mairie issues us with clear plastic bags so that the bin man can check whether the household rubbish includes anything that should have been recycled, in which case the bag will not be collected, nor will they collect any rubbish not in the official bags.