The H-Block Song Lyrics And Guitar Chords By Francie Brolly. The guitar chords are for the included youtube video. If you're a beginner guitar player and don't like playing F#m chords then just play an A chord instead, as it's fairly close.
Updated list of songs in PDF Books
There are a lot more tin whistle tabs in the ebook that are not in the paperback version
The Tin Whistle Sheet Music Book With Easy To Play Letter Notes