If you are into this level of detail then you need to discuss this with an agent, travel agent, or use Expertflyer or ITA Matrix. If you were to provide the dates hen I can look it up for you. What I suspect is confusing you is that part of the fare rules is standard, part is particular to the fare basis (here INX8T7G6) and the layout here and on BA.com gets in the way of understanding it properly. So yes, if you mix non refundable components in with refundable components then it's a standard rule that that mixing does not make the whole ticket refundable.