Changes to Law 41.7
For those who may not be aware, Law 41.7 covering high, full pitch bowling will change on 1st April 2019. See link here: https://www.lords.org/news/2018/november/mcc-announces-intended-changes-to-law-41-7/
In summary, as is already the case with short-pitched bowling, the umpire will now decide whether a full-pitched delivery is dangerous, based on various factors such as the speed or direction of the ball, repeated delivery of full tosses and the ability of the batsman.
There is no longer a ‘catch-all’ sanction, but umpires are instead required to use their best judgement to determine whether a delivery is dangerous. If it is dangerous, it will lead to a first and final warning. If not, it will still be a No ball, but there will be no warning. See Law 41.7 for more details.