If you're relying on the information in MMB on increased Avios/TPs being correct, then sadly - don't! The likelihood is that you'll receive what you are due for the purchased fare.

However, you will be entitled to lounge access at Manchester by dint of your same day CW boarding pass. You'll need to show it alongside the one for your MAN-LHR flight.

All revenue flights with a separate flight number count as a qualifying flight.