My video efforts were poor and not very audible. There is little high ground and i couldnt see the bird at all. I was cautious as there has been an escaped Canary type thing on Hackney Marshes a week or so ago and I didn't want to mess this up.
Eventually Paul arrived and the bird had been silent for 15 mins. Then it called clearly a 5 syllable undulating song. Paul said 'Thats got to be Rosefinch' , I scanned and saw the bird distantly perched up in a Hawthorn.. "ITS A RED ONE!',
The appropriate texts and calls to locals as well as RBA etc were made and people began to arrive.
It Seems to be a First Summer Male, the median coverts are white- tipped rather than pinkish red and the The red tones aren't hugely extensive. But a beautiful bird and an interesting time of year to see this species in Britain.
Many people seem to have come to see, and hear it and I'm very pleased to have eventually found a (much more) twitchable bird on the patch.