Oasis is my go to for shirts, lovely prints and I always get lots of compliments when I wear them.
I love a Joules coat, they are quality and if you have a google you can often find a handy discount code, they also have lovely scarves.
I think hats are still trendy, but I'm not a hat person, unfortunately, haven't found one that suited me yet.
Personally, I'd steer clear of a full faux fur gilet, maybe go for one with a detachable faux fur trim instead, it will carry you through the seasons too.
Not entirely sure on the poncho front, it is transporting me back in time to a period in my fashion history that I'd sooner forget, but that's not to say they aren't still en vogue - if you like it then go for it, when you are confident wearing something it's half the trick of looking good.
Enjoy treating yourself OP 