Mk did five sessions in 1979. Steely Dan, Mavis Staples, Sandy McLelland, Lee Fardon and Bob Dylan.
The one with Mavis Staples was before the Dylan one, probably Wexler and Beckett needed someone or want to try how good was MK as a session player...
Sandy and Lee sessions were both in London, actually MK produced the Lee Fardon session but he wasn't happy with it and didn't release it, until recently. Just search in YouTube "Windows display" by Lee Fardon with Mark Knopfler.