With effect from Premier League 2016, if a league match in public green cannot finish within four hours, the match will stop immediately (even it is in the middle of an end) and postpone, unless there are rinks available to continue the match.
If the subsequent booking is for another league match, both sides should finish the current end. The match will stop and postpone afterward.
During the extended period, if the unfinished end is burnt, the match will stop immediately and postpone. The burnt end will be replayed anew in the postponed match.