> No Conservative government has served an entire term with an outright majority since Thatcher in the 1980s

I don't understand what you're saying about John Major.

Here's the 1992 election: https://en.wikipedia.org/wiki/1992_United_Kingdom_general_el...

336 seats, out of 651, with 326 needed for a majority.

Current conservatives have 288 seats out of 650.