Just returned from a B2B, LGW - BOD. As the wiki suggests, it is doable however with risks. I would disagree however that BOD is an efficient airport, security lines are minimal, however passport control queues were ridiculous. I waited about 20 minutes before moving to the front of the queue (ignoring the tutting) to make sure I made the flight. Perhaps this was just a bad day, the cabin crew mentioned other passengers had also said how bad the queues were, but just a word of warning for anyone else who might be planning on doing this run!