To apply for a reception place, you will need to apply online through the Local Authority (Islington).
More information about applying for places can be found on the London Borough of Islington website here: Apply for a Primary School Place
Below is a link to the Islington Primary School Admissions Booklet. This booklet explains the admissions criteria for community schools (page 20). Within this you will also find the link to an online application form and further information on applying for a reception place.