1924 cover from Belfast to Oldham via Airmail to Liverpool

1924 (May 9) cover from Belfast to Oldham via the Airmail service to Liverpool, slightly crumpled and boring in most respects, except that this cover shows actual commercial use of this service to expedite business correspondence! Howerver, due to bad weather (there were no flights May 9_^th to May 11_^th), this letter was not held over and was sent by the usual surface route via mail boat and rail.