Some of the wooden props dislodged during the launch float down the river, now no longer needed, to become more flotsam and jetsam.
The tugs, having done their job, return to their bases.
Looking from the top of St Mary's Tower in Birkenhead Priory, the red hull of the RRS SDA can just be seen behind a grey ship.
Apart from the last photo, all photos were taken from Monks Ferry looking up the river.