This is Paul Anderson's own arrangement for Bandiera Rossa which he's playing in the youtube video on his low D whistle. Moresheet music for tin whistle is here .

The first piece of music is in the key of D and goes fairly high, up to the high B in fact. [ more song notes for tin whistle ]The second is in a slightly lower key but all the G notes are sharp, which means if your playing this on a tin whistle you'll have to half block the G notes.