Using the original CaDDI instrument we collected 5 waves of time use diary data across the pandemic period in the UK, including during 3 'lockdowns' and 2 periods of relaxation of restrictions, plus a 2016 baseline (data available from the UKDS core collection, study number 8741).
Since then, inspired by the 'contact' diaries used for modelling purposes by epidemiologists, we have designed a version of the CaDDI which includes more information on crowding while doing particular activities, or in particular venues, and the age/sex and degree of contact with people respondents report as being 'with them' across their diary days. The idea is to combine the detailed information on activities of the time use diary (as well as information on location and social interaction) with variables of interest in epidemiological studies in respect of crowding and social contact (as in the POLYMOD 'diary').