Slow play (again)
Scenario: As TD you finish the 3rd board of the round, mindful that as declarer you have been slightly slow as the clock you are using has counted down to zero. You look at the 6 table room and 4 other tables have finished and the 5th nearly. Meanwhile the 6th have only just taken the cards out and a couple of bids have been made.
Pragmatically you want to take that 3rd board away and get on with the movement, explaining that you know you shouldn't take away a board that has been started, but in the interest of pragmatism and to keep everyone else happy (the room is becoming agitated about some of the slow play) that is want you want to do, and to score it as "not played" (again, not EBU recommended approach but pragmatic in a club situation).
One of the players defiantly says that they have had no warning (as apparently required by EBU regulations - is it?) and insists on playing it much to annoyance of you (as undermined TD) and the rest of the room who want to get on and play the next round (and thence to the bar before it closes). Does the fact that you pointed out a few minutes previously that "you should be on your 3rd board", combined with a clock that by then has counted down, constitute an implied sufficient warning?
Any come back?
How can the situation be avoided?