Commotion in Kings Langley Woods (5th May)

On a late night walk with Theo at about 11:30pm, I was heading back along the western edge of the Common when a Magpie began screeching (a rather unusual time to start giving alarm calls) I hypothesized that it might have have been disturbed by a Tawny Owl at its roost, and sure enough 2 Tawny Owls (1♂,1♀) also began hooting and "kewweeking" from nearby.  Despite making a short detour into the wood, I couldn't see either Tawny Owl.  This was getting rather frustrating as I haven't seen one so far this year, despite having heard them on dozens of occasions in the past few months.