I used Lutterloh system ages ago. It works, but time is needed to mark the size out onto large sheets of paper. One day I may get round to using the pattern books again that I have. We are so lucky to have many pattern choices today.
It takes a little time to draw out a pattern. But the results are usually a perfect fit.
It takes time to work with paper patterns, and then they may still not fit.
I have a TNT blouse, a tank, a cowl and a skirt that I make over and over. If I am in a hurry and need something for a specific event and have left it too late, I use a TNT and make the fabric sing the song!
I also buy velum from the US Lutterloh site, I am sure that there is a UK site. The velum is wonderful, erasable and I use it for a press cloth as well.
I rarely use other patterns. I have two TNT Lekala tops and one shirt dress that I use over and over.
And I have some Vogues that I rarely use.
I love Lutterloh and love to leaf through my books and supps.
I am happy to encourage and support you!