Jane runs classes on Saturdays too - at It's a Kid's Thing in Earlsfield. I did postnatal and have gone on to do Body Back and Pilates Flow and if we have another, I'll definitely do pregnancy pilates with her. I love her classes and love the way that I can bring my son with me too.
I'm pretty sure Michelle teaches Saturdays, rather than Jane though. I think they are 9:15 to 10, with the Pilates Flow class 10 to 11. Best thing is that my son can play for free with his daddy while I'm exercising!