Hi Big Rob
I would learn or update yourself on what to do with high bg's.
Such as @mushypea stated.. Its normally a correction bolus you give with high DKA levels.
If you are tired you should still wake yourself up a minimum of every 2 hours until your levels have started to substantially reduce.. (Under 12.0 for me)
And always if you get a high level like that which suddenly occurs... Was your hands thoroughly and re test. It's easy to have prepared food and still have a residue of it on your finger tips.
You may well have a different unknown reason to us for giving 50 units of basal.. But personally increasing basal is normally only done for a longer term illness such as flu or steroid treatment etc