Came down the S Oxford onto the Thames at Isis Lock. We had seen the stoppage notice for Dukes Cut lock, so although we were heading for Lechlade, had to shlep into Oxford and back out again on the river.
Talking to the lockies on the way they all said that the lock was usable, albeit slow going. Turns out the top gate paddles are broken, but the top gate leakage allows the lock to slowly fill. The bottom paddles are working normally.
So on the way back from the Thames, we turned up Dukes Cut, and found the lock was filled. Went in, emptied the lock and out we went. Going the other way involves a wait of about 15 mins while the leaky gates fill the lock apparently.
Sorry if this has been mentioned before, but it could save a lot of time for someone.
By the way the River was pretty deserted, and the recent weather made it a glorious trip.