NO. Once a smell has been reportd, there is NO allowance. Very annoying if, say, there was a massive and obvious leak on a gas applince, which you sorted, and you are left with a 0.5mb drop, somewhere else. Technically, you cannot leave the tiny escape.
I dont disagree with that.
BUT, I take the view that the smell of gas needs to be confirmed by the occupiers at the point when you would like to leave.
Previous smells of gas may have been a hob burner turned on and not ignited.
One old codger insisted there was a smell of gas when he put his nose into the 1/- meter. I could measure no leak but told him that if he insisted on saying there was a smell then I would have to turn it off!
Tony