Mike, mine was exactly the same on way back from CPOP
overall average this weekend over 450miles ish was 37.0,probably would've been better had we not sat on the M40/M4 for 2hrs ish....most i've ever had i think was about 40.1 but MFA's are notorious liars!
as a side note, car was tramlining and pulling like a mofo on Thursday in the heavy winds etc on the way to birmingham,was quite a hairy drive....was sure i could hear an intermittent knock as well somewhere around front offside but as it was occasional couldn't be definite. Myles checked my wheel bolts on Saturday,everyones now paranoid i think!
and lo n behold the front ones offside had worked loose. torqued them up and knock has disappeared and the drive home was a much more pleasant experience