Falling populations and low birth rates are a world wide phenomena. I think Italy and Japan have the lowest rates in the world. Even countries like India and Bangladesh, previously everyone's cliche for huge population, now have birth rates close to replacement only. Africa is the only continent with birthrates still well above replacement level.
Looking at things globally, population rise is being driven by increased longevity, world wide. And a good thing too. Many of the problems of this planet are driven by the huge population of Homo Sapiens that inhabit it and to know that within 50 years the total number will have peaked and will then start to reduce, can only be greeted with sighs of relief for our descendants.
Silly arguments whether from assinine MPs or anyone else about birthrates in tiny areas of the world's land masses do strike me as being a lot of twaddle. Over population, everywhere is resolved more than anything by educating women who can then enter the labour force, and are able to make their way in the world and not having to submit themselves to marriage and endless pregnancies. When a woman is making a contribution to the household income, that income is too precious to be lost because she cannot work because she is expecting yet another child.
In an ideal world, the human population should at least halve, it would drastically reduce the contribution we are making to global warming and enable humankind and the quintillions of other species that live on this planet with us to live more in harmony.