I've just checked my measurements - thanks for the thread Grub.
Inseam - in socks to crutch in cycle shorts
Pedal to saddle height - Top of pedal (Time RXS), crank at 6'o'clock, to top of saddle in the centre (fore aft centre)
Inseam: 865mm
Previous pedal2saddle: 890mm
Pedal2saddle @ 105% inseam: 908mm
I'll try this out and report back when I have put a good couple of hours in the saddle.
I guess, as with bike fit in general this is a guide to get one close, from which point fine tuning is expected?