1931 Census of England and Wales, General Report, Table 75 : " Regions, Administrative Counties (with Associated County Boroughs) and Large Towns with Highest Proportions of Colonial Born".

Area Proportions per 10,000 of each sex Area Proportions per 10,000 of each sex
Males Females Males Females
           
ENGLAND AND WALES 57 56 Counties Regions    
           
REGIONS     Sussex, West S.E. 132 166
      Southampton S.E. 140 152
South East 99 102 Sussex, East S.E. 124 154
      Wight, Isle of S.E. 114 142
  London and five surrounding counties 94 94 Surrey S.E. 117 133
  Greater London 92 91 Devon S.W. 102 114
  London Administrative County 103 99 Dorset S.W. 94 116
      Oxford S.E 116 94
North 32 23 Kent S.E 99 108
  N.1 27 17 Cambridge S.E 135 69
  N.2 51 28 London S.E 103 99
  N.3 22 20      
  N.4 35 26 LARGE TOWNS    
      Hove S.E 197 205
Midland 30 31 Gillingham S.E 160 172
      Wimbledon S.E 162 170
  M.1 33 34 Oxford S.E 206 124
  M.2 24 24 Cambridge E. 242 87
      Eastbourne S.E 156 170
East 42 38 Bournemouth S.E 145 174
      Portsmouth S.E 154 159
South West 83 99 Ealing S.E 126 153
      Hastings S.E 120 155
Wales 35 19 Hendon S.E 136 138
  W.1 39 17 Poole S.W 82 134
  W.2 26 26 Brighton S.E 101 114
      Cardiff W.1 167 31