Saw the thread title and knew it would be these... :P
Recently bought a pair, and plan to wear them with merino knits now (indigo, royal blue, fuchsia, pale grey) and cotton/silk shirts later in the spring (olive, white, shell-pink). They're definitely mustard/ochre irl, not sunshine yellow. The blogger a pp linked to looks fabulous, but a black top is too harsh I think. I'll be adding flat shoes and an LK Bennett leather belt - that hideous ring/rag effort has already been binned.
I'm (ahem) years old, tall, hourglass size 8, fwiw. Like strong and unusual colour combos (dark skin). Hardly ever buy clothes in M&S (as they're usually vile).