Good News! Up to 27 titles can be removed from the 'notune' list at a stroke: that is the number of titles that come up when '@recitation' is requested from the DT. I don't know them all, but 8 of them are Stanley Holloway recitations:
42)ALBERT AND THE LION
44) ALBERT'S RETURN
45) ALBERT'S REUNION
3064) SAM, SAM, PICK UP THA MUSKET
3062)SAM SMALL'S CHRISTMAS PUDDING
3434) THREE HA'PENCE A FOOT
275)THE BATTLE OF HASTINGS
267)THE BATTLE OF 'ASTINGS,
while
2283)MATILDA
is a poem by Hilaire Belloc

so at the very least, these 9 titles can be removed from the list.

ALSO, two of the above titles [275)THE BATTLE OF HASTINGS and 267)THE BATTLE OF 'ASTINGS] are identical apart from some spellings.

Noreen