Looking at  this page https://www.cunard.com/en-au/the-cunard-experience/what-to-pack - I'm sure the dress code has changed e.g.  Smart Attire evenings, I quote:   Smart attire simply means a dress shirt and trousers, skirt and a top, or a cocktail dress.   i.e. no mention of  jacket or tie.  The Gala evenings are still "black tie dress code" without further elaboration of what that means    I know that's the Australian link - but I  dug out a VPN and found the same