Thank you, hollieberrie - will nip into GAP tomorrow (although I suspect I'll be better off after the sales, to be honest). I see she's wearing slip-ons in a couple of the pics, and although they don't look expensive, they do go, so all is not lost in my more casual moments!
Boffin, those are lovely, and actually look a good sight more sturdy than my ballet flats. I will look into them - thanks! I did wonder about penny loafers as well, but wasn't sure what I'd do about socks.
I was hit by some inspiration this morning - my hair can often be spruced up or tamed by spritzing it with water. Nipped into Superdrug and got one of those travel spray bottle things. Going to keep it in my handbag filled with water, so if necessary I can just spruce myself up to look a bit more presentable...!
Mama, on the crumpling front, somebody once told me that if you pinch the fabric and twist slightly in a shop, and then hold it there for a few seconds, then let go, you can see how easily it'll crease. If it comes away scrumpled, you'll be a crumply mess quite quickly, but if there is barely a mark, you should be ok. No idea if it actually works - or whether fabrics like cotton just crease easily anyway, so it might only be for synthetic fabrics - but worth a shot?