I learned this from a Youtube video of a performance at the Irish embassy in Russia. The entire gang was there and Brian said that they had gotten back together and were working on new material for a recording! What great news for the new year!
Brian plays this tune on an A whistle in the key of D. I’ve notated it in D. He never plays the melody exactly the same but I’ve tried to get the gist. In particular, on the fourth bar of the B part, the long note is often A, but at other times is played as c, f, or a.