Merseyside's Police and Crime Commissioner has joined calls for a Hillsborough Law to ensure fairer treatment for bereaved families.
Emily Spurrell has united with seven other Labour commissioners to "put pressure on the government".
It follows renewed calls for a Hillsborough Law by Liverpool City Region Mayor Steve Rotheram and Greater Manchester Mayor Andy Burnham.
The government has previously said it would engage with bereaved families.
Ninety-seven Liverpool fans died as a result of the crush at the FA Cup semi-final match at Sheffield Wednesday's ground on 15 April 1989.
A Hillsborough Law would introduce a statutory duty of candour on public servants during all forms of public inquiry and criminal investigation.