Well as an update on my post above, I'm just back from the try-out..
...and, um....no.
The drummer was nice enough but the guitarist was...well, just a bit abrasive all the way through. I'd been sent three tunes so we played through them, without comment from him, and then he spent the rest of the time showing me some other songs that it turns out have been recorded....why didn't he just send me all the songs and have me learn them ? Seemed a bit of a waste of time to do it that way.
I left after about an hour, and politely told them I'd think about it.
Hey ho, on with the search.