Thank you Olaf, the viewfinder settings are: EVF brightness - Auto, EVF colour - 0, EVF colour adjustment R:0 B:0. The preview exp/wb option was turned off as we could not see anything through the viewfinder or on the screen to be able to frame the shot. I naively thought that the image displayed on the screen would match what was produced, I wasn't expecting such a dramatic difference. 🤦♂️