Just before Edwyn Collins came on, the throbbing bassline of Chic's "Good Times" rumbled out across the packed South Bank auditorium. As a statement of intent it was pretty clear. Having suffered two debilitating brain haemorrhages followed by a bout of MRSA in 2005, Collins is understandably delighted to be gigging again. To paraphrase the old stand-up comedy opening salvo, he is probably delighted to be anywhere again. Some paralysis down his right side means he walks with a fetching silver-topped stick and does not play guitar onstage any more, but nothing held him back. His rapturously received, emotionally charged performance was captivating.