January 2020
LHR-CAI - £239 W to J
CAI-LHR - EGP 5,200 (approx £240) W to J

Couldn't get my credit card out quickly enough; I took the upgrade on both sectors. The 'offer' through the BA app was £2,300-odd (one way, LHR-CAI) two days before departure! The cheapest it had been in the app prior to departure was £702 each way/£1320 both ways.