But when it comes to which song represents which letter, guitarist John Brewster says it's not simply a matter of what the song title starts with.

"We've had to get a bit creative," Brewster admits.

"For instance Be With You, which is one of our huge songs, is under U. It's not under B because Shadow Boxer is B - when we would write a set list we'd call that song Boxer.

"Ivory Stairs is in the show but that's under V, because there's a V in it. Then you think how many songs we've got that start with S, that became really difficult."

Not as difficult as Z. While the band does have a song called The Zoo, which is pieced together from a live jam, Brewster reckons it's impossible to replicate live.

So, being fans of ZZ Top, they opted to go for a cover of La Grange for the concert closer.

And Q? Well, that's the audience's choice.

"That's Question Time - 'what do you want to hear?'," Brewster says.

"Invariably they call out for Mr Damage. He's not M or D - M is Marseilles and D is Dogs Are Talking.

"There were times when people would come to our shows with banners saying 'please play Mr Damage'. Sometimes it'd just be 'please play it'.

"That was such a huge song for us - we could have released it as a single but we never did."

The A-Z Tour is a two-and-a-half hour show, which Brewster says is an hour longer than their normal concerts.

The show is aimed at the fans and gives them a chance to hear some of the songs the band doesn't usually play live.

Though Brewster says that hasn't meant he's had to go back and relearn those songs.

"We've rehearsed a few things but these things are a part of our psyche," he says.

"I could probably pick up my guitar and play every song we've ever done without rehearsing. Rick [Brewster] plays all those solos so he has to rehearse a lot.

"We've done different shows where we've played the whole Darkroom album or the whole of this or that album, so there aren't too many songs that aren't ingrained in the band anyway."

The band has had a tumultuous history, with infighting, members quitting and rival outfits both laying claim to The Angels' name.

Not even family bonds could withstand it - in 1986 Brewster left for six years because he needed a break from his younger brother Rick (who is actually the only member never to have left the band).

"Being in a rock'n'roll band's a funny kind of existence," the elder Brewster says.

"That was a time when we actually did need a break from each other. These days we get along great.

"It's different now, we don't tour like we used to. There were times when we'd go out on the road for weeks on end, when we were travelling overseas it was months on end.

"That's a fairly unrealistic lifestyle and certainly does cause some pressures.

"These days we only go away on weekends and on Monday we fly home again.

"We have a wonderful balance between our private life and our band life."