You might want to spend the rest of today updating your CV. Any prospects you had at your current companyy are now Scotch Mist
can you explain what I have done that's instantly sackable?
He's not implying that it was sackable, more so that your prospects with the company may have diminished somewhat.
exactly. I wasn't implying that it was sackable, just that you'd (a) pissed off your manager – never a bright thing to do, (b) gone to the MD –
not in itself a daft thing to do, but doing it on an email that you copied to your boss – "you plonker, Rodney".
They can't sack you for being stupid or insensitive, but your manager can certainly make sure you never get any juicy work to do; he'll never fight your corner if you need him to; and probably worst of all, he won't recommend you for a payrise. Ever.
In those circumstances, you may as well find somewhere else to work.