Already reported this morning (although not the earliest sighting) & there have been several decent photos on Avonbirding blogs.
Showing well and singing again today, early evening.
Still calling and showing well at 8pm
Still showing and singing very strongly from 5.30-6pm. A lovely bird to bring up my 300 species in UK and just 3 miles from home.
And still singing and showing this morning. On the track towards Avalon Hide past VP1
A River Warbler at Ham Wall today was a first record for Somerset. The first UK Mainland River Warbler for a decade apparently.