Originally Posted by
Blueboys999
Although it is entirely possible that the agent will call the additional charge "taxes" it is no more than additional fee going straight to BA.
Indeed so, that was rather my point and we appear to be in violent agreement
For all that the fees are entirely under BA's control, I will say I do still find WTP->CW UuA on the East Coast USA & Canada routes as something of a sweet spot in terms of Avios value, especially on peak dates.