Can we start a grassroots revolution against this pernicious abuse of grammar that is taking over the language? I've heard it a number of times on BBC Radio and almost everywhere else.
"I'm stood outside the offices of HMRC."
"I was sat on the train for hours."
"I am standing."
"I was sitting."
"I was sat" is grammatically correct only if used passively. It means somebody else had sat you on the train without your volition or control (and for this reason isn't possible with 'for hours' because it was past-simple, one-off action).
CORRECT: "The mannequin was stood outside the shop to attract customers." (The mannequin was placed there by someone else.)
I appreciate there will be people who'll say, "Oh the language is always evolving and we have to accept new usages." But if we accept this, we lose the difference between active and passive voice. What's next? Abandon tenses?
[PS, I have just finished a large coffee]