Bookend problems occur in terraces when a combination of processes lead to the end building being pushed out of plumb. Usually this requires both a force from the terrace (some form of expansion) and the loss of stability in the end building. The loss of stability often results from removing the internal walls without providing sufficient bracing.
In Well Road, Exeter, a shop is being converted back into dwellings. You wouldn't expect that to involve removing internal walls. Usually (as indeed in this case) it means that the large opening in the front wall is at least partially bricked up. Non-the-less, here is a spectacular example.
Not only is the end wall leaning, but the timber bressumer beam has enough load on it to pull the small inner support with it. There are substantial cracks to left and right. It looks as though the builders intend to leave the timber bressumer in place despite having removed the protective shopfront.
It would be tempting to assume that this sway is new, but a look at the back of the building shows that it was certainly there before the extension was built on the back. What is worrying, though, is that I am almost certain that the ground floor spine wall has been removed as part of the alterations. If it has, we may expect furtehr movement in the near future. If it hasn't the movement may be slow but will surely continue without some further structural action. It is clearly helpful that the fromt wall has been replaced and, pending the rotting out of the bressumer, this may be enough to prevent the progressive collapse that was well on its way.
And before you ask, yes I have alerted Exeter Building Control!