Is this a Merlin? Spotted by the lake today in Hainault Forest, London

www.rspb.org.uk/.../kestrel
The link above is about Kestrel facts from the RSPB website.

www.rspb.org.uk/.../merlin

This is about the Merlin.

Explaining the bidifference between the Merlin and the Kestrel!/

www.birdguides.com/.../

Thanks Ian. Agree, a rounder head, more prominent eye-moustache, rounder wings, etc, makes it a Kestrel. Good to learn the differences.