The "rejection text" includes a link to the Electoral Commission, which includes this section...
Motivational mindsetsApplication of the COM-B behavioural framework highlights that the primary barrier or enabler to registration is motivational.
The research has observed three motivational mindsets which act as the primary building block in registration behaviour. Two of these are barrier mindsets and include
disillusionment in the political system or politicians, and apathy towards voting.
The third is an enabling mindset focusing on engagement in having your say or voice heard. The research suggests that there are a range of motivational, capability-based and opportunity-based hooks which could encourage registration across these mindsets.