This file is a lookup between LSOA (2021), Sub Integrated Care Board Locations (SICBL), Integrated Care Boards (ICB), NHS England Regions (NHSER ) and local authority districts (LAD) in England as at 1 April 2026. (File size - 6.7MB). Field Names - LSOA21CD, LSOA21NM, SICBL26CD, SICBL26CDH, SICBL26NM, ICB26CD, ICB26CDH, ICB26NM, NHSER26CD, NHSER26CDH, NHSER26NM, LAD26CD, LAD26NMField Types - Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, Text, TextField Lengths - 9, 40, 9, 3, 65, 9, 3, 77, 9, 3, 24, 9, 35