Yes but should you not be focusing on the rail network and businesses in London hiring such people?
I fail to see how Brexit will change over crowding?
it wont stop it but will not make it worse. control the numbers coming in. I heard Farage on the radio last night and a migration statistics group was on with him and said that we are going to have more people in the uk than Germany in and that by 2020 we will have more than France (memory recall not double checked but listen to the link).
http://www.express.co.uk/news/uk/750457/Britain-population-77million-2039-EU-report-Migrant-Watch