Chin up old boy, I flew LHR/MAD last week and there wasn't a 'natural' English accent on the flight! In fact it was like flying with some Italian/Spanish/French airline where many words were so badly pronounced that passengers were sniggering with embarrasment and amusement.
I then flew on IB back where all the crew were Spanish and it sounded as the Spanish national carrier crew should! Spanish!!!
When was the last time a BA flight had a true Brit crew