The original gates were removed when the dock was closed to shipping, being replaced with much narrower quadrant gates. This makes access difficult for rowing boats as the oars are too wide.
To get in I got the crew to toss oars and helped maintain forward momentum by paddling with stroke's blade, accompanied by a vigorous rendition of Just One Cornetto.
It didn't really work - the boat behaved in a very peculiar way and we drifted round the lock in a rather embarrassing way until bow managed to grab one of the ropes dangling from the side and we got into position.
The following day we brought paddles for bow and cox and things were much more under control.
Thanks to Mick Buckley for the pic.