In London, at least, you are not allowed to use an open fire place, because of the smoke pollution. Currently you can use wood burners that meet a certain standard (as they produce fewer harmful particles due to reaching higher temperatures) but I understand that will change soon and these will be illegal as well.
So how on earth are things like fire pits legal? They produce as much smoke pollution as open fire places, and are probably more anti social, as the smoke is not going up through a chimney but at ground level, so more likely to get into your neighbours’ houses.
I was just thinking about this as was reading an article about people having fires in their gardens to socialise outside.