This is a small add-on for Related Topics. Related Topics shows a block at the bottom of each topic containing the five most recent topics with similar titles. It picks topics from all the forums that a user can view, based on the permission settings of your phpBB.

This add-on changes that last bit of behavior, limiting the displayed topics to those in the same forum as the current topic. Permission settings are no longer checked because that would have been done when displaying the current topic. This results in faster topic page generation.