Doing a quick google search on a lock in London that I mistakingly thought had sector gates I came across this excellent site that has aerial photos of hundreds of sea locks around the world:
http://marinas.com/browse/lock/ It includes one ofKilrush lock. http://marinas.com/view/lock/232_Kilrush_Lock_County_Clare A quick look at the site I came across the following lock that appears to have sector gates: http://marinas.com/view/lock/319_Swansea_Marina_Lock_Maritime_Quarter%2C_Swansea_WA Tim
