Former Rolling Stones star Bill Wyman felt "disappointed" and under-used when his ex-bandmates asked him to join them for their 50th anniversary concerts in November (12).

The bassist reunited the band for two London shows, but only set foot onstage for two tracks.

He tells Britain's The Times, "Keith Richards called and said, 'Come on mate, why don't you have a jam with us?' Then they asked if I'd be interested in getting involved in the band for a special occasion. I thought I would get quite heavily involved, so when they said they only wanted me to do two songs I was a bit disappointed.

"I only had one rehearsal and no soundcheck, so I just winged it. It was great, but I didn't want to go to America for two songs. I think they understood."

The Stones went on to play a further three dates in New York and New Jersey in December (12).