Thanks for sharing your experiences J-B, and it is reassuring to know that my leakage variance is not unusual.
Peter, I have updated my profile, and there has been some recent improvement, when looking at the statistics rather then just how I have felt. Perhaps the days I have been doing more outside work (like the gardening) I have been more lax about the Kegels due to less spare time and a tired feeling as a result of the work. I am also aware of leaking while twisting and lifting (while sitting on the ground) but I have been less active on the gardening over the past week. Subjectively the leaking is worse in the afternoon which would suggest that the pelvic floor needs more exercising.
I have been using the pump alternate days approx over the past week and the readings have been 71, 40, 30, 56, 66, 90, 31 (the 31 was yesterday), and it is difficult to see a reason for the variation.
Thanks to you both for your interest