The government are bringing in (photo) voter ID meaning you'll need to show your passport or driving licence when going to cast your vote.
By all means reform the postal voting system but not this. Not everyone drives or goes abroad and this will bar many people from voting. Driving licences and passports are not cheap.
amp.theguardian.com/politics/2021/may/10/queens-speech-photo-id-future-elections-social-care?