Thanks guys for all you comments. They are really useful.
Bernie - With regards the key of the song, I tend to select lower keys when I sing slow or medium pace songs as I have more control over pitch and vibrato then - However, When I sing uptempo songs on a gig I pitch them higher to stretch my voice a bit. However I will try it again a notch or two higher as you suggest.
I've been gigging for over 40 years but singing for only 4 or 5 so I'm still not that comfortable with it. I'm also useless at remembering the words but both the Kedtron XD3 (which I have now sold unfortunately - Dreamer) and the Tyros help out with.
Zuki - All the voices were Tyros 2
Stephen - The answering voice you hear is me when I recorded the second track but used a little more reverb and the vocal processor preset "2UnisonLow".
Jim - The style is called "Classic 16 Beat"
Thanks to all of you for you kind words and constructive comments.
Kind Regards - Keith