I popped in today - very limited stock, shop assistant mentioned sourcing own shirt cloth and they can make a shirt for £65. He did suggest speaking with Erlend about detachable collars and also about sourcing cloth.
Save your money and leave the buttons alone.
I have jackets (sport jackets and suit jackets) with and without working buttons, it does not make a difference; it does seem nicer when putting the jacket on, but I forget about it afterwards.
If I am getting a bespoke jacket or suit made, I would want working buttons; however, would not spend the money on tailoring for rtw jackets.
Spend the money on decent scotch, Cuban cigars and hookers instead
Braces - plain white TM Lewin braces work for me
Pocket squares - stocked up a few years ago, £15 a piece from Duchamp; never understood the need for expensive pocket squares.
Collar stays - Hackett sell bone collar stays for £5/pair, do not see the point of expensive mop or silver stays.
As for Bresciani socks I think they are worth the cost although I get them from the Edward Green sales for about £10.
I have had two jackets from them: i. suit jacket - straight pockets and ii. tweed jacket - slanted pockets with ticket pocket. Both jackets were made how I requested.
They seem open-minded, so their response about the pockets is very surprising. Whatever product or method you selected should not matter, if you asked for straight pockets, they should have made straights pockets. If it was a sports jacket, I would ask for a discount and maybe even on a non-work suit;...