After yesterday's unexplainable high numbers I decided on some drastic action, and bought new strips for my Aviva & Contour and opened the free Accu Chek Mobile I had.
So with 4 side by side tests this morning, I had 2 of 5.6 one of 5.5 and a rogue 6.4 from the SD Codefree.
Not sure what that tells me, other than you get what you pay for.