Control opening and closing times are printed on the brevet card, and should be adhered to.
The following is unofficial, based on anecdotal experience and in no way guaranteed to reflect your own experience if you find yourself in the position. If in doubt, stick to the above paragraph!
However, AUK is a pragmatic organisation that seeks to recognise effort where possible. So, provided the ride is done within the overall time limits, it would not be unexpected for the intermediate control times to be interpreted laxly. Which makes sense, as for more events the intermediate control distance (and so the open/close times) are generally rough and ready, and only the finish control is given any great scrutiny when setting up the event.
Often it boils down to the organiser. Some are sticklers for the rules, whereas others will adopt a flexible attitude.
But don't take the piss - show an effort to get to the control in time and, if running late, let the organiser know so he can inform intermdiate controllers.
So, in order of variants:
- Get proof of control and carry on (but if you contact the organiser, the controller may stick around)
- Likewise. A couple of minutes is usually treated with a blind eye
- This gets a little more tricky. You may need to justify why you were hours out of time. In practice, you are either likely to be viewed as taking the piss (and so get told where to go) or not be in a position to finish in time
- Not for me to say, but my observation is that if you don't take the piss, you will be ok
- Not really. More down to the organiser you are dealing with. Some are ball breakers. Others have a lassez faire attitude.
Hope that helps....