LONDON, June 18 (Reuters) - A 1996 portrait of brothers Liam and Noel Gallagher at the height of their Oasis fame heads to auction next week as the siblings prepare to start a series of reunion gigs.

Noel (58) and Liam (52) Gallagher haven't shared a stage together for 16 years. Now, in just a few days, on July 4th, they'll make their live comeback. But it's not just these concerts that will hold ...