Former Oasis stars Liam Gallagher and Paul 'Bonehead' Arthurs were mobbed by hundreds of fans when they paid a surprise visit to a new exhibition in honour of the band. Chasing The Sun: Oasis 1993-1997 opens in London on Friday (11Apr14), 20 years after the hit group released its first single, and the organisers staged a preview event on Thursday (10Apr14). Oasis frontman Gallagher and original guitarist Arthurs made an unannounced visit on opening night to check out the exhibits, but they missed most of the display because they were mobbed by fans on arrival and spent almost an hour posing for photos and signing autographs. Arthurs tells NME, "We didn't get to see (the exhibition) - we got f**king mobbed. But actually going in there with Liam and seeing what I did see was pretty emotional... We looked at each other and went, 'Is it really 20 years ago?' Mental, man - time flies... I'm glad we made the effort - we both said tonight that we're glad." The rocker, who quit Oasis in 1999, said other members of the band, including main songwriter Noel Gallagher, are unlikely to attend, adding, "(Drummer) Alan White's in Spain, Guigs (former bassist Paul McGuigan) couldn't make it, and Noel's recording, so we had to come really. It's good that some of the bandmembers made it. Liam is Oasis, so the fact he turned up and had pictures with people is great."