The largest number of seats the Tories have won since 1987 was in 1992, when John Major won 336
The last full-term Tory government was 1992 - 1997, under John Major
The last stable Conservative prime minister was John Major nearly 30 years ago.
Ever since then they have held only a series of weak and fractious governments
They are a chaotic party, and they have been for a very long time
All I'm pointing out is that the Tories have not been able to govern the country without supervision for decades.
And that coalition arrested their development, so that when they won a full majority again they pissed the country away on a stupid referendum
They never finished their regeneration from the last Blair landslide of 2005