I've emailed a contact in GIB to see what their current base fares and and will post this if they have changed so the spreadsheet can be updated. Will check the ARN costs too.

I agree the cost of getting to the start country has to be taken into account - if we get the tickets via GIB then we'll have to pay for flights & accommodation. If we use ARN, then I am there twice on business this year & have friends to stay with so no cost incurred for this.