Ferweg, I'm sorry - you're right.
Here's more information on the bus transfer. If you have any further doubts, I suggest you repost on the UK/Ireland branch with a title something like "Heathrow - Stansted fastest transfer?"

Even at the same time as mine.
Would still opt for a ticket on a regular airline all the way to Bordaux.
Ferdinand

Tony & Ferdinand:
Thanks again for all your information. I finally booked my flights and ultimately the options into Bordeaux, based on the rest of my flights and the carrier, were just too expensive. So I did end up booking the Stansted-Biarritz flight on Ryanair and will probably stay in Biarritz for the evening before heading to Dax the following day. However I managed to get a slighter earlier flight into Heathrow, so I now have just over 8 hours from the time I land in Heathrow to the time I depart from Stansted instead of the original 5 hours. 8 hours feels mentally comfortable to me, even if there is a slight delay in my inbound flight.
Gene