@zuludog it sounds like it was quite a scary situation and must have shook you up once you had recovered from your hypo. It is good to hear that you are safe.
This discussion has caused some deliberation so thought I would offer some clarification on the matter.
The DVLA guidance is that
"If you get warning symptoms of hypoglycaemia whilst driving, you must always stop as soon as safely possible."
The
'as soon as safely possible' part of that could be open to interpretation and judgment really. As you were in a situation where it was not immediately safe to pullover at the time, it would be acceptable that, with your knowledge of your own diabetes, you could wait for a safer place to stop. As the situation escalated quickly, you did pullover with the intention of treating the hypo.
This means (from the DVLA's perspective) you were aware of the signs and took steps to treat them. In an ideal situation, you would have pulled over sooner, but without a hard shoulder, this was a balance judgment of whether it's 'safer' to stop in the inside lane, or find a place to stop safely. When symptoms became more critical, you resorted to the next 'safest' option, which was to stop in the inside lane.
The DVLA state that a license should be revoked if you have had a 'disabling hypo' at the wheel. If the Police had found you in your car unconscious, or there had been an accident, then they
would have likely considered it a disabling hypo. As they found you 'treating' it, they would not have considered this under the category of 'disabling hypo'.
You have been very fortunate and I am glad that this did not result in anything more serious. I am sure that this has been an experience that will mean that you act differently in managing future hypos due to the difference in the speed at which it came on.
In addition, as you have experienced a hypo quicker than usual, this may be something to share with your diabetes team. Your diabetes can change overtime and it may be something for you to review in case any hypos come on quicker in the future. You can also learn from this that it is important to have hypo treatments within easy reach when driving. However, even with hypo treatments in the car, you should still pullover to test and treat the hypo properly. Having sweets within reach may have just helped you in reaching a safer place to pull over.
It is understandable that there was concern about what the possible consequences were, and the incidents leading up to this, but as you mentioned, you made judgments based on your
own experience of your
own diabetes, and acted as best you could in order to remain safe.
In answer to your initial question - you would not have to disclose this as a 'severe hypo' to the DVLA as you were able to administer your
own hypo treatment.
This would also unlikely be considered a 'disabling hypo at the wheel' again - as you pulled over. So, if you have safely pulled over, and treated your own hypo, then this would not be considered 'disabling'.
Hope that offers a little more guidance on the technicalities around how the DVLA and Emergency services assess these situations.