So,  two sensors,  one 17.5% too high,  the other 17.5% too low.  The irony is marvellous. Still,  at least if I use both I'll have some idea of where my blood glucose level really is...! Another phone call to Abbott in the offing tomorrow I think.  They will be getting as bored of me as I am of doing their trials for them.
On a slightly different note,  I was reading the detail of the clinical trials they are doing in the US.  They are taking a sample of 164 people,  and giving them one sensor and a reader,  then having them do 8 scheduled blood tests per day over 14 days to prove the accuracy of the reader/sensor for the FDA.  I thought it would be relatively easy to replicate this (and I think 164 is more than the European  sample ) using forum members.
Is anyone up for it?