Paris Orly has been a surprising omission for some years. The Eurostar train was a notable competitor years ago from London Waterloo, but ever since it moved to St Pancras station, along with some ever-increasing departure bureaucratic hoopla worthy of Heathrow rather than LCY, seems to be less accessible from Canary Wharf and the LCY hinterland. I did hear it's moving gave a significant boost to the Heathrow-Paris flights at the time, which had been in the doldrums since it originally opened back in the 1990s