robin day 675 chairs - table to match?  

Depends on what you are...
Depends on what you are using the chairs for...office or home? I think a long rectilinear table made of steel and and wood would suit your chairs. There's a company called .... that custom builds anything for you. They are architects that design products and interior home furnishings. You should check it out.
(edited by DA - no advertising please)

British tables
These chairs would look great around a John and Sylvia Reid for Stag S Range
table from the 1960's or a 1950's Kandya dining table.

A nice
Pieff 'Lisse' or 'Eleganza' table would work well.

Knoll tulip table?
Knoll tulip table?

What's the budget?
And what shape/size best suits the room?