Neil and I have been been watching this nest for the last couple of months, there are three chicks , there is quite a size differance between the largerst and youngest one.
We watched the female bring food which they all tore into with glee.
We watched them last week as well and noted a big change in there development in one week.
http://www.flickr.com/photos/sspike/3557453959/This is a pic of the female after feedind them, you can see bits of whatever she fed them on her beak