Right, a couple of points:
I haven't tested for ketones so I don't know if I'm ++ or +++ or whatever, so I can't adjust my bolus insulin up by whichever percentage is appropriate.
My supply of ketostix was binned earlier this week (of all times to decide to bin them!) when the DSN informed me the shelf life has recently been found to be 3 months shorter than stated and they're not accurate enough after this time. I didn't think to get a replacement because next week on the DAFNE-type course we're all being given meters that test for ketones as well as blood sugars. It didn't occur to me that I'd end up as high as 30. My mistake!
I think I'll stick to 3u correction dose every 4 hours because my readings have already come down to 20 and the last thing I need is to swing the other way.
Regarding the other stuff about adjusting my doses and bedtime readings - I probably should have said that those bedtime readings are taken AT LEAST 4 hours since my last carbs and bolus insulin. The DSN said this is enough time to be 'clear' of them and for any insulin to have been used up etc. Then at that point I take my basal dose and go to sleep, leaving the basal as the only insulin working in my system without the influence of any carbs or bolus insulin. So in theory if it's the right dose, the blood sugar readings should be +/- 2mmol when I wake up.... that's the thinking behind it apparently. So it's not the actual reading itself that's important at that point, it's the difference between the two readings that's shows whether you're on the correct basal dose. Once that's sorted, I tackle the carb to insulin ratio throughout the day to get my actual BG readings to an acceptable level.
I'm just going on what I've been told in this DAFNE-type course I've been on this past week.
After 21 years of type1 diabetes, I am only just this past year realising how bloomin' complicated it all is!
Oh and I dragged my mum to Tesco Pharmacy just before it closed on the off chance they had ketostix, but no such luck.
Thanks again everyone!