May I bring up a few points and ask for some help please.

I have seen the word Arrocher used as the name of the line of tweed fabrics by Marton Mills who make many of the jacket fabrics, but not to a style of jacket.
Would you post a picture of this jacket for me please.
If it is indeed a jacket style it will be the first I have heard of it and am intrigued.

In the past most of the advice from members of this forum has been that Tweed is considered casual day wear. I think this is the first time I have ever heard someone advise that it was suitable for formal events. Would someone be so kind as to post a photo of Tweed used as formal wear.

The prevailing advise has always been that Black Tie is Tuxedo equivalent. The advice has always been Tuxedo shirt (studs and cufflinks, not buttons) and black bow tie worn with either Black Argyle/Braemar/Crail jacket or Prince Charlie also in Black.

And a third 'first' for me is the idea of Argyle jacket paired with Trews. I can't remember ever seeing a photo of trews worn with anything but Prince Charlie or Doublet. Could someone post one please.