Sure! - Jon did his first UK solo gig in '97 at the London Forum.
(see my sig! )
Richie also did three gigs here, two at the Shepherds Bush Empire
in July '98 and one in Manchester a day or two later.

They both also did a lot of promo in London too. Jon did a couple of stints at Virgin Radio and also did Capital radio, TOTP, TFI etc.
Not forgetting the Sounds and Visions concert at Wembey Stadium and the radio one roadshow gig in Bournmouth, Dorset.
Richie also did a secret showcase gig at Ronnie Scotts in London, which was organised by the record co. There were only about 50 fans there!