A majority verdict can only be returned when the judge thinks it appropriate and the jury say, when asked, that they haven't yet got a unanimous verdict. And that can only be done after a minimum of two hours deliberation, to which is added the time that it takes for all the jury to get back to the jury room, taken to be ten minutes.
The majority is, of 12 jurors, 10 agreeing. If there are only 11 jurors, one having been discharged, it is also 10 agreeing. If there are only 10 jurors remaining, it is 9 agreeing.
The time for the direction depends very much on the nature, the length, and the complexity of the case, or any of those factors.