Building a new bike from British made components, how far could you go?

Roberto I was going to write a short list but hippy said everything! ;)
BUT... he missed X-lite (rise bars/seatposts/this and that)
Royce also used to make chainrings back in the days but they are very hard to find!

You ain't an ebay POWER SELLER for nothing! :)

Their seatposts are puurty.. http://www.x-lite.com/newsroom.html