The notorious tetrad J

I last came this way 5 years ago and I remember having to use secateurs and a billhook to chop my way through the public footpath. Today, on the spur of the moment I decided to investigate another nearby public path which I've not been on before. Stepping over a stile and through a hedge, a wonderful, overgrown, boggy vista materialised. Marked on 1:25000 maps as the upper part of Nant Brynmaen (SW of Stags Head), it was about a kilometre long and maybe 300m wide. The walking was difficult to put it mildly, but occasional yellow and green arrows showed that some intrepid member of the council or the ramblers maybe, had been here before me. Six Willow Tits were present at four places and I also saw 3 Woodcock and an unlikely Crossbill in a row of pines.