Mystery Bird

Seated in may garden in Ashbourne (South Derbyshire) I am used to the familiar bird sounds. Occasionaly we have interlopers and I usually pick them out on BirdNET. Tonight's mystery has both BirdNET and I stumped. A pair of largish (crow), brown (from a very limited observation) birds in a tree clearly in an angry discussion with the local corvids. The call can be hear at 5-7 seconds then again at the end.

I appreciate any input.

KinleyLongrose Lane 2 (1).m4a