https://www.electoral-reform.org.uk/voter-id-list-gives-few-options-for-younger-voters/
Valid voter ID will include a 60+ Oyster card but not an 18+=Oyster card.
The Lords amended this to include ID more often available to young adults but the government has reversed it.
Why?
@ParkinJim - they don't like young people. They don't vote for them. Its a disgrace.