Well, after reaching the summit to Tryfan two days ago, yesterday the boys in Wales apparently bog-walked (ewww! E reports bog water over his boots), taking measurements or some such — and then swam. Which I reckon was sorely needed, after several walks and no running water (ewww!).

Number wise he was okay all day, though a little high, but in the evening things went seriously awry. For whatever reason (too much free carb? too low a temp? the set becoming non-viable? — probably all three), at 6.30pm we got a message that he was 24 mmols (over twice as high as the high end of what we were all aiming for while he was away) and feeling rotten.

It was dark by then, and they have no electricity. E had been trying to change his set (due a new one) on his own, with a torch, ill from being high, and stressed to the max. And wouldn’t you know it, for the first time since changing over to sil sets, his pump read NO DELIVERY.

A number of things then cascaded into wrongness. E was holding up, but only just holding on.

OH talked him through. Minute by minute, several phone calls, clear instructions. Try a new tube. Then a new cartridge. We gritted our teeth as E described all his pump equipment strewn around his bed in half-darkness. Talk about stress!

Tell someone, I texted him, in some desperation. They will be sad to know you are struggling.

He was still 21 mmols, despite a huge correction.

All of us had forgotten that he remained on a low temp from earlier in the day.

At last the new set was in with insulin that looked viable. But E was terribly shaken, still high, and of course would not be able to join the others for dinner (it’s unsafe to eat when that high for obvious reasons: more glucose stacks into the blood).

When E is that high — and I think this is a common reaction — he becomes emotional and muddled. He has to make a supreme effort to exert his considerable strength of mind and intelligence to trying to gain control, to understand sequences. The added stress of being away, in the dark, and on his own, meant that for a short time, it was a losing battle for him.

This end, we were losing our own battles too. OH was preparing himself to drive six hours and go get him. I was wrestling with useless tears. Daughter M, once again, had wisely set herself up for dinner in front of the box.

At last OH convinced E to go to a teacher. Who phoned within minutes. She had taken control quickly. Found things he’d lost. Sat him down to wait. Established how long he’d been high.

We tried to explain how he’d be feeling. We said it should get better. By this point we’d set a high temp, and anticipated him coming down fast. She’d saved some food for him. If he’s not down in a couple of hours, OH began — we’ll drive him to the hospital, the teacher said.

Probably not, OH said. They won’t know what to do either.

And this is true. Don’t even get me started on what medics don’t know. How they will remove pumps. How they will run both glucose and insulin in simultaneously (completely counter-productive). How they might think that 2 mmols is fine (when it’s mega-hypo), or that 6 mmols is too low (when it’s within range). Or that, so long as the person is feeling okay, 18 mmols is not bad (three times as high as you want). I’m sorry all you medics out there, but these are true stories. The training for hospital diabetes treatment must be seriously deficient, and is entirely crisis-oriented. By hook or by crook, diabetics survive hospital intervention. But so often it is ridiculously and even near-dangerously cack-handed.

Anyway. E had some carb free food: cheese, ham, cucumber, and immediately began to feel better. In 20 minutes his level was 17 mmols. He ate. In another hour, he was way down to 9 mmols. By this point the high temp was off. He had to have some free carb or he would crash. In another hour he was, yes, low at 3.8 mmols. Some juice, and more free carb.

Like a yo-yo. Poor lad. He set a 70% temp to reflect the exercise of the day, and we all agreed he could make it without night testing. Crisis over.

Only guess where they are headed today: SNOWDON. The highest mountain in Wales.

He must be shattered. Up until nearly 1 am. A walk lasting many hours in front of him.

We’ve barely heard from him this morning — a rush getting out, apparently. I’m fearful that last night will hang over him, tempt him into insecurity, into double-guessing his judgement. He’s SO good at all this. He’s great. We keep telling him.

A little prayer then: let last night go. Start the new day. Trust your instincts. Know that you are strong, and can do anything.