From an earlier thread, “Bag of Weed” is from Chitty Chitty Bang Bang (Me Ole Bamboo)
And one that I don’t think was broadcast: I’ve Got A Little List was taken from The Mikado.
And from Road To Europe, So Awfully Different is inspired by the Crosby / Hope road films (Road To Morocco for example) but doesn’t seem to be identical. Road To Rhode Island is much closer to Road To Morocco.
So many of the others sound familiar but I can never put a finger on what they’re parodizing.