Hi Alan,

I have looked into it and have to admit to being completely baffled by it. All your other age gradings are spot on and unless John can come up with an explanation we'll put it down to a glitch in the tables!

At least it wasn't a pb run :)

Hi Alan

Perhaps you had a birthday in between the two runs.  I found a similar effect last year and this was the reason.  The age grading appears to round to the nearest year so, at our sort of age, you get a benefit in the period after your birthday that is slowly lost through the year.