Originally Posted by KARFA

So there are two things which you might be confusing.

Part payment with avios
This is when you book a normal revenue fare and on the quote page you are offered a few options like "£50 off for 7500". This just reduces the cash required but has no impact on TP and avios earning. It usually looks like this:



Avios & Money payment
This is for reward bokoings. On the quite page you will be given the option to reduce the avios required by paying an additional cash element. For reward bookings you do not eanr any avios or TPs, and paying a bit more cash to reduce the avios doesn't change that. It usually looks like this (ignore the red circle):