An impressive amount of bike space on a London Northwestern train between Bletchley and Bedford.
This is the whole front third of the front carriage of the train, which is only a two carriage train in total, so therefore one sixth of the train has been reserved for bikes. Note that the middle section of seats on the left also folds up I believe, so you could get even more bikes in. The rest of the carriage has the more traditional front/rear facing seating arrangements.
And in a "if you build it, they will come" scenario, it was clearly popular with cyclists. When I got to the station there were already two other people waiting on the platform with bikes and another got on at the next stop. While most of them got off at various stations en route (I was the only one doing the line end-to-end), it did mean that for most of the journey, there were more bike riders on the train than there were passengers without bikes - this was the middle of the day, not at peak times admittedly.