The jacket of the season has to be the grey (preferably checked or Prince of Wales to be exact) blazer.
If you can’t get your hands on one, here’s a few I found. Yes I threw in a couple of other jacket styles too in case you’re not the blazer type. You are welcome!
Stella McCartney wool blend jacket
Annarita blazer
Etoile Isabel Marant blazer
Topshop grey suede biker jacket. Also comes in cobalt blue.
H&M teddy biker jacket
H&M wool checked blazer
Topshop fur collar denim jacket
Mango checked blazer