Career
In the late 1970s, his quartet featured Bobby Wellins. Among many other recordings, in 1981 he appeared on the Hoagy Carmichael tribute album, In Hoagland. In the mid-1980s he re-united with former if band member Dick Morrissey in the jazz-funk band Morrissey–Mullen, before returning to a more straight-ahead jazz approach.
Some of the jazz musicians Richardson worked with were Dexter Gordon and Chet Baker.
Richardson released the album Chapter One on 15 October 2009. His album 2 Plus 2 was released on 22 April 2010.
He was one of the guest speakers for the launch of the Princess Royal Trust for Carers "Out of Hospital" report, held on 21 July 2010 at the London Medical Society. He had been a carer for his partner, Maggie, before she died of cancer.
Richardson provided a carers perspective to the gathered professionals, on behalf of the PRTC, to help campaign for more consideration by hospitals, to the needs of carers during patient discharge planning.