1931 Census of England and Wales, General Report, Table 73 : " Regions, Administrative Counties (with Associated County Boroughs) and Large Towns with Highest Proportions of Natives of Ireland".

Area Proportions per 10,000 of each sex Area Proportions per 10,000 of each sex
Males Females Males Females
England and Wales 93 97 COUNTIES Region    
           
REGIONS     Lancashire N.4 185 163
      Cheshire N.4 156 140
South East 102 133 Southampton S.E. 138 153
      London S.E. 120 167
London and five surrounding counties 102 135 Surrey S.E. 107 150
Greater London 107 144 Middlesex S.E. 109 135
London Administrative County 120 167 Anglesey W.2 115 115
      Sussex, East S.E. 84 141
North 123 104 Devonshire S.W. 109 114
      Wight, Isle of S.E. 98 117
  N.1 70 49 Sussex, West S.E. 79 128
  N.2 78 57 Berkshire S.E. 103 101
  N.3 76 55 Kent S.E. 86 105
  N.4 180 159 Hertfordshire S.E. 85 102
      Dorsetshire S.W. 85 97
Midland 46 49 Cumberland N.2 98 78
      Yorkshire, North Riding N.2 102 65
  M.1 . 48 52      
  M.2 43 42 LARGE TOWNS      
           
East 35 36 Bootle N.4 462 392
      Birkenhead N.4 319 311
South West 79 86 Liverpool N.4 325 304
      Barrow-in-Furness N.4 314 266
Wales 78 57 Wallasey N.4 263 280
      Stretford N.4 263 217
  W.1 84 53 Manchester N.4 218 205
  W.2 62 65 Salford N.4 218 205
      St. Helens N.4 255 141
      Plymouth S.W 211 179
      Wimbledon S.W 167 222
      Hendon S.E 126 216