To the OP:
You don't say if you have toured in the UK before but, nowadays, lighting a camp fire would be considered a bit unusual and anti-social. I think that is one of the reasons you are getting lots of non-serious responses
The only people I can recall seeing with a fire were a group of wild campers in a remote part of central Wales who were getting ready for an illegal rave which then kept the whole valley awake for most of the night.
It depends where you camp.
There are well over 500 Scout and Guide camp sites in the UK - I have never seen one without a fire. (As I'm a Leader we have often used them even when touring without Scouts etc in tow)
I have a number of 'where to camp' type of books, 'fires' is usually one of the check list items, a suprising amound of the sites do permit fires (often with named restrictions, such as use an altar etc). after all there is very little difference betwen an open alter fire and a BBQ
I have also done a lot of wild and stealth camping, if a fire is possible and we can hide all trace so that within a few days no one would ever know, then we have had fires.
My Mother tells a story of how she went on her first foreign cycle tour in Normandy/northern France in the very early 1950's. They set up camp the first night on a camp site and started building the fire to cook on and were amazed when the owner arrived with a bucket of water and put it out. They had been touring in the UK a number of times before and had always cooked over an open fire. They had pots and pans but no stove. The owner then sold them a Gaz Stove, they had never seen a gas powered stove before that point. They were amazed to see that all French camp sites had 'no fires' rules, whereas English ones at the time would have expected you to cook ove an open fire and would not have sold items such as camping gaz. How things change