From what I read looking online, The West Midlands Combined Authority, allows OAPs with an issued pass, to use buses and trams in the areas they cover:
Birmingham: Coventry: Dudley: Sandwell: Solihull: Walsall: Wolverhapton.
Though I had always thought that a pass issued by any Council or local authority in England, allowed travel throughout England.
Perhaps this England-wide allowance has altered?