Trousers that fit like M&S Mom jeans?

[reluctantlondoner]

I love my M&S Mom jeans and live in them, but obviously they are quite a casual look. Are there any very similar fitting / style trousers versions for smarter occasions? Basically high waisted, not too tight, flattering on a size 14?! I don't currently own a single pair of trousers that fits!Thanks for any suggestions!

Whistles barrel jeans and trousers look quite smart and there are often a bunch on eBay if you want a wider selection of colours and fabrics than what's in the shops. I usually size up but I'm very high waisted and prefer a baggier fit.