Troise also led a second band, Troise and his Banjoliers, essentially the same musicians swapping to play a wide variety of banjos. This band broadcast regularly on the BBC's "Workers' Playtime"** radio programme, the louder sound of the banjos being more audible in noisy factories. It was for this configuration of the band that Gran's banjo-mandolin was made.
** it was "Music While You Work" not "Workers' Playtime" as pointed out by the comment below. Thanks to Brian Reynolds for pointing out my mistake.
One New Year's Eve Gran made a phone call to her brother Arthur, a very fine banjo player himself. After the usual greetings Arthur says " Hey, 'ave you 'eard this one?" and proceeded to play a tune over the phone. " That's a new one to me, Arthur, but how about this one?" and Gran played a tune. Thus they went on exchanging tunes until Gran said, "Look, this call's going to cost me a fortune, I'll have to hang up." At this point the telephone operator from the exchange interrupted "That's alright, keep playing. All the telephonists here are enjoying the music. We won't charge you a penny for the call, just keep playing!"
To hear Troise and his Banjoliers try this link or this one.