The original composition by Henry Gilbert, who according to Wikipedia
died on May 19, 1928, is in the public domain in most, possibly all
countries, with the exception of Cote d'Ivoire. This brass band arrangement
of Henry Gilbert's work by Derek Moule is released under a Creative
Commons Attribution-ShareAlike 4.0 International License but cannot be
used in countries where the original work by Henry Gilbert is not in the
public domain (at the time of writing this, not to be used in Cote d'Ivoire).
Please check and obey the copyright laws of your country.