The band agreed to make the trip to Wanganui if suitable transport could be found. The Australian air force came to the party by offering to lend a plane to fly band members into Ohakea and back to Australia.
Because travelling space will be limited, Brass Wanganui members will lend their instruments for the one-off performance at the school's Prince Edward Auditorium. Mr Grigsby said British miliary security had visited Wanganui to ensure the band's safety.
He said the Band of Her Majesty's Royal Marines was arguably the best brass band in the world. "Nothing like this will ever be seen in Wanganui again - it's a once in a lifetime opportunity."
All proceeds from the concert will go toward restoring the 1926 organ, a job expected to cost about $700,000.
A four-course dinner catered by Jo Power will be held at the school for band members and guests before the concert.
The Band of Her Majesty's Royal Marines will perform at 7.30pm, October 2, with the pre-concert dinner to be held at 5pm. Tickets for the dinner and concert, and the concert only, are available from the Royal Wanganui Opera House.