It is a tricky problem  when I started working on this I put in a cut off point to make it possible to aim for a completely inclusive list  mainly because below a certain level the sheer number of shipwrecks and coal mine disasters becomes unmanageable But it does lead to some rather odd exclusions hence the addendum TalkListofUnitedKingdomdisastersbydeathtollSmallerdisasters We could include Other notable disasters or Selected smaller disasters as a subsection on the main page but then how do we define notable  Other options might be as you say to reduce the cutoff point slightly though that still leaves odd omissions eg Great Fire of London OR include only postth century smaller disasters    Any other thoughts