A few headlines from the report:
General attitudes towards elections remain largely unchanged from previous waves of this study. In Great Britain, most voting age adults (63%) still prefer voting in person at a polling station, while 3 in 10 (29%) prefer postal voting, and a small proportion (1%) favour voting by proxy.
Among those who did not vote in the General Election, the most common reasons cited were not wanting to vote for any of the available candidates (20%), a lack of trust in politicians/MPs (18%), and being away or lacking time on election day (17%).
A majority of voting age adults in Great Britain (80%) reported that the photographic ID requirement did not impact their desire to vote in person. A similarly high proportion (81%) indicated it also had no effect on their preference for absent voting methods.
The executive summary can be read here: https://www.gov.uk/government/publications/evaluation-of-electoral-integrity-programme-public-opinion-research-wave-3/evaluation-of-electoral-integrity-programme-public-opinion-research-wave-3-executive-summary