Birds galore and a question

Brids galore singing at Railway Fields right now especially the rejoicing robins. Last year's Dawn Chorus Walk brought 60 local people  - 4.30am!!- and was unforgettable with different birds joining in as they woke up, a crimson sunrise and croissants. We'd like to hold it again in May and are looking for someone to lead who can tell us who is here. Who is the Harringay Birder for instance?