Thanks, mine's in the post.

Good economical use of fabric! As @Silver Rose says, the seams need a good press with plenty of steam. You've made a lovely neat job of covering the raw edges  but I think your tape is too thick & stiff. A Hong Kong finish on the seams would have been twice the work but with lightweight bias tape wouldn't have made the seams as stiff. The hem has lost its swish for the same reason. I can't see how you finished the hem. Generally, the thicker/heavier the fabric the deeper the hem. This allows the weight of the fabric to help the drape. I'd have turned it to the inside in one fold (at least 70mm) stitched a lightweight bias tape over the raw edge then slip stitched the hem up by hand. Or you could press the hem to the outside then machine lightweight bias tape over to give you the contrast band on the outside.Well done for making your own tape - did you weave it? If so it's only one thickness, but if you've made bias tape then the folds have made it too thick for swishing. You've chosen an ambitious project, in a challenging fabric, congratulations on your maths & design skills, I look forward to seeing your future projects.

Wow! That is really pretty. If I were to do patchwork, that's the sort of thing I'd like. But I'd only want to make one  .

Phew! That's a relief, in my diary I have the 5th as posting date so was panicking yesterday.

Welcome! Guernsey is beautiful and warmer than here too I believe.

That's lovely, I do like black & fuchsia.

That's lovely, nice colour and grain.  Very useful.

Welcome @jmatt  Cushion covers are a good start. I believe those 1950s Singers are great workhorses.