Sorry for not getting back for soooo long!
Only just got round to experimenting with the EHP today having just upgraded to Jessie (which seems very fast!). I simply followed the setup instructions in the Readme.md file and all is now working. I ran the welcome.py from the LXTerminal as advised and it worked a treat :-)
So thanks to Gadgetoid. I'll work my way through the docs and see what else I can do with this HAT.
Cheers,
Andrew