Thanks for the reply,
It seems to stop after the last line shown below.
update-initramfs -u -v -k 3.16.0-4-amd64
Keeping /boot/initrd.img-3.16.0-4-amd64.dpkg-bak
update-initramfs: Generating /boot/initrd.img-3.16.0-4-amd64
Copying module directory kernel/drivers/hid
********
Calling hook zz-busybox
Adding binary /bin/busybox
Calling hook dmsetup
/usr/share/initramfs-tools/scripts/local-block/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-premount/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-premount/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-top/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/init-bottom/ORDER ignored: not executable
/usr/share/initramfs-tools/scripts/local-top/ORDER ignored: not executable
Building cpio /boot/initrd.img-3.16.0-4-amd64.new initramfs
Thanks
Mike