Britain is far fom self-sufficient in both energy and agriculture. Young people are struggling to get on the property ladder. The National Health service is overstretched. Our roads are congested. The country is a trillion pounds in debt. The more the population increases, the more we have to import as a proportion of what we consume. To pay for this we have to export more and more goods per head of population. This does not appear to be happening, at least not sufficiently to bring the national debt under control. It seems to me we need more immigration like a hole in the head.