I spoke to Jennings' daughter Celia, while Bob Corn of the Eagle Society was extremely generous in helping to dig out details of Jennings' life and work more generally. Thanks also to Colin Brockhurst of the fanzine Vworp Vworp! for sharing his research.
The sumptuous new collected edition of the TV Century 21 Daleks strip is still available. In DWM issues 558 and 559 last year, I argued that Jennings was an integral part of the sprawling, multimedia Dalek empire - his opulent artwork feeding into the movies, merchandise and back into the TV show.