I started in January and finished at the end of August 2003. Basically booked 1 lesson per week to start with, and then once my solo circuit work was coming up, I started to book double slots. I also took a couple of weeks off and booked a double slot each day. Needed a few triple slots for QXC and GFT.
I only lost 2-3 weekend slots because of weather, however in the two weeks that I booked off, on one of them, I only flew once, as it was sh1ty all week. Those lost days did come in handy, as I still pitched up at the a/f for some of the day, and spent time with instructors doing work for exams etc. (and drinking coffee)
I'd go along with the other people who say "go for it" and do it as quick as you can.