Hi thanks for the advice.
@b15erk Clips! What a brilliant idea.
@Bodgeitandscarper Wondertape! Sounds like a 70's super hero. I definitely need some wondertape.
@Efemera. I have to admit you are probably right about tacking stitches...but they don't sound as much fun as sparkly clips, super hero Wondertape or even claggy glue!
The fabric I'm using for my shirt is 4oz dark denim.
I've had a little play with the glue. (Looks a little bit like Pritt stick glue but much firmer).
I have enough fabric to make some practice plackets. It seems like forever since I last sewed one so I definitely need to practice.
I'll do one using glue and one using sensible tacking stitches!
Who knows I may end up using a combination of both for the actual plackets on my shirt?
Oh and yes, I'm on the lookout for clips and Wondertape to add to my sewing box!