Hullabaloo

Hello

I've been enquiring with EY about redeeming miles for flights on Oman Air. They can check availability but cannot give me the final cost of the taxes/charges etc, until I go ahead with the booking because partner redemptions "are complicated". They advised I check the taxes on a revenue flight. I asked if for redemptions I would have to pay for fuel surcharges and they couldn't tell me. I checked on Oman Air's own website as well as the ITA Matrix and other sites, which include the fuel surcharge. I know that EY does not charge this for its own flights, but I understand this could be different if they are booking a partner airline's flights. I've been unable to check what Oman Air charges for their own redemption flights in such a scenario.

Does anyone have any experience with this that can advise what I can expect? If it helps, I am looking at a one way flight in Business between MCT and LHR.

Thanks in advance.