//Oops selective memory syndrome has clicked in.
PMQs was not broadcast live in 1990, the BBCs digital channels did not exist. So you could not have watched it, let alone accurately remembered it for 30 years.//
Am not sure where you think Paigntonion said he'd seen it live gromit.... am not sure if there were filming then so footage may exist but it was defo broadcast on Radio 4 cos i used to cheer on Callaghan, Foot, healy(?), Kinnock against Thatcher