Long two-part interview with John Parish on the "Great Song Adventure" podcast recently. No real new ground covered regarding his work with Polly, but interesting nonetheless. He talks about her contribution to his new album starting around 18 minutes of part two.

Part One: https://www.podbean.com/media/share/pb-s5d8z-98b8e8
Part Two: https://www.podbean.com/media/share/pb-rrph2-999f5d

Pete Wareham and Kushal Gaya from the jazz/rock band Melt Yourself Down (very good, check them out) have been running a series of Instagram Live lockdown/quarantine interviews with various musicians (including Mica Levi, Shabaka Hutchings, Anna Calvi, Nadine Shah etc.) and Kush has recently interviewed John Parish. He asked him about working with Polly, especially on White Chalk, Let England Shake, and Hope Six. The interview can be streamed here, the Polly bit starts at 1:06:12.

The whole interview is very interesting, John also talks a little bit about recording Sparklehorse's album It's a Wonderful Life to which Polly contributed vocals.