I had been figuring on taxes and surcharges adding about 10% to an AONE4 ex-CAI. However, I have just ticketed mine in the last day and on the base fare of EGP 41680 (which includes paying for an extra economy segment), the taxes/surcharges were EGP 5880-- i.e., more than 14%. It has been arranged directly with BA-CAI. Be prepared.