Thanks Sewbee yes that is the pattern. The latest Threads magazine 207 February March 2020 has an article featuring this pattern and the person who has made this up was also using Totally Stable - iron on, tear away stabilizer to create even parallel tucks.
I already have another pattern by Simplicity 2365 which has a tucked central panel with shoulder princess seaming, and a center front seam with buttons just sewn on the seam, and also Simplicity 3786 which is very similar and also has shoulder princess seams, but I rather like the way a V has been created in the Butterick pattern and proper buttons and fastening loops, and it is the way the V shape has been bound and cuts across some of the tucks that make it a little different.
I am hoping that some tops made using these patterns with the tucks will give just that little bit extra space to cover my abdomen which seems to start high up under the bust - you never know it might even disguise this part for me - I live in hope!
Thanks also Jessie - it may well be the first of the Simplicity patterns I mentioned again discontinued, I spent a long time on making a center front tucked part ready to merge in with the shoulder princess toile I have been working on, I tried various sewing machines trying to get the tucks just right without the foot on the machine getting pushed aside and of course the last machine I used was the most expensive of my collection and has a 9mm needle width and that made such a difference - I have never sewn so many trial tucks in my life before and used a zipper foot, an ordinary foot, an old Singer edge stitch foot - they all got in the way of the previous stitched tuck. Now that hopefully spring and summer are on the way I need to get a move on and get this trial top connected to the rest of the bodice and see how it is looking on.