Originally Posted by
moral_low_ground
Interesting - and thanks for doing.
Actual taxes of 2888 GBP comes out to about 39750 NOK at today's ROE so that's about 160 GBP more than what your calculation is above (and probably close enough that its likely that its correct).
Despite BA not being able to provide me a breakdown - and it's not in my BA receipt - I went on to the Finnair website and they sent it to me and the taxes are as follows:

Air Travel Taxes - The Travel Insider
This is out of date but it shows what codes go to which country. Over the years I have learned to stay away from anything BA ticketed on RTWs. The YQ is terrible. Its like dealing with Ali Babba and the 40 thieves. Your other taxes look normal. UK , AUS , NZ , and the USA are 4 of the worst for add on taxes. I always ticket with the AA rtw desk.