Hi everyone

I apologise at the outset if this has been answered elsewhere.
I am BA Gold and am making a reward booking from DEL-HKG-HND return (which would be in CX all the way with change of flight at HKG) in July, by using a combination of cash and Avios.

My question is - if I were to cancel or change the flight, would I have to pay BA any charges.

I know there are different charges amongst fares but will that cancellation or change charge be in cash or avios deductions?

Thanks