The Energy Follow Up Survey, 2011: Lookup File: Secure Access contains various ID variables which enables the Energy Follow Up Survey, 2011 (EFUS 2011) (available from the UK Data Archive under SN 7471) to be linked to English Housing Survey data. The following variables are included in this dataset:aacode - EHS case numberinterview_id - EFUS interview IDtemperature_id - EFUS temperature IDmeter_id - EFUS meter read IDemonitor_id - EFUS electricity monitor ID