Smallbone, Martin Moore, Mark Wilkinson, Tom Howley etc. are all mass-manufactured kitchens with a few twiddly elements which they call bespoke but which are just standard cabinets with a built up or scribed frame. They can't or won't give you a piece that exactly fits your funny alcove and uses the same mouldings as your 19th century architrave. For that you need a cabinetmaker. About £2000 a unit, so the same as the big names. The downside is that bespoke joinery and cabinetmaking is not automated and computerised so the lead time is mad. Not everyone has six months to wait for their kitchen.
Clive Christian are proper cabinetmakers but their house style is irredeemably naff with no respect for architectural integrity.
Not for the first time, Piglet John is right. If money is no object, put in a Hacker kitchen (the property developers' favourite as they are cheap and the production line is so slick) and hire a private cook for £150 a day.