On Monday (18/8), after a wet night we left went up Cowley lock with NB Heron who had moored up near Cowley Peachey. Through Uxbridge we followed the two very slow narrowboats we met on the Paddington Arm. NB Heron accompanied us all the way until Copper Mill Lock where we took on water and had a sandwich lunch. NB Heron took longer and followed on later. This section is a surprisingly pretty part of the Grand Union given how close it is to Central London. The rain threatened all the time we were on the move but it managed to stay dry until we moored up at Stokers Lock.