Whilst it wasn't Doha to London.
In January, we were booked on a flight Istanbul to Aberdeen via London.
Because the BA flight was late and we would miss our connection to Aberdeen, we were transfered to KLM, an airline that I have never really enjoyed flying with and flew Istanbul, Schipol, Aberdeen. I assume this was to save on having to pay for overnight accommodation in London.
BA appears to have got worse in recent years in other ways too.