It's taken me five years to train. Partly because of personal things that have happened along the way; partly because I am a procrastinator. Some people do it in 2.5 years; most about 3.
Tutorials are one day per month. You will need to allow one whole day for this - most people have to travel quite some way to a tutor; I've had two and each has involved a journey almost two hours each way.
If you can put aside another 1-2 days per month for essay writing and preparation for teaching practice/presentations at tutorial that will help enormously.
There is a lot of reading which you can pick up as and when. It's a good idea to subscribe to a midwifery journal such as Practising Midwife.
You have to observe two sets of antenatal classes as part of your training so if they aren't local you will have to factor in travelling to see those as well as the course itself. They may be 8 evening sessions, a weekend course, two Saturdays/Sundays or 4 x 4hour sessions.
You also have to attend study days - three one day sessions on Obstetrics/Labour and two others as a minimum.
There's a weekend residential workshop as an intro to the programme and another 'pre-teaching' weekend residential workshop. Before you qualify, there's a one day workshop.
It's also useful to attend the NCT's annual conference (usually two days in June/July) at osme stage during your training and a Specilist Worker Forum (one day, usually in March/April).
Finally.... you have to be familiar with your local branch and build up relationships with local health professionals. This all takes up more time. You might choose to take a role such a lay rep on your local maternity user forum or help out at your branch's nearly new sale or be a co-ordinator who arranges the first get together for parents who have finished an antenatal class, for example.
Please feel free to ask for more info!