The the libretto aka the story /musical its self was written in 1945, but based on a 1909 storyIt does make me wonder if someone but the royalties to the musical, probably at a massively lockdown price, and just put an end to it.
Songs are good for 67 yrs so since 2012 its in the public domain
The rs will have to pay a fee to play Jerry Marsdens version
And he and or the Parlophone(?) will have paid to record it.
This later version has its own copyright, but as it was recorded before 2012(?)
Whoever sung it would also have paid a royalty.
Short version; Sadly, it won't happen