Hi
 
Yes granted they are without doubt the best choice for concourse. the only genuine period tyre made by a top manufacturer.
 
These tyres are shipped to most places free of shipping charges.
 
But the most important part is that they will handle better on your car than a modern tyre (unless you have modified the geometry of your car to suit modern tyres by changing the caster and camber). 
 
Modern tyres don't handle as well on classic cars as the tyres that these cars were designed in conjunction with. Horses for courses. Modern wide low profile tyres will improve your stopping distances in a straight line and diminish wheel spin in the dry. But a period tyre like the CN36 (or a tyre that is designed to be fitted to cars like this like the Avon CR6ZZ) have  rounded shoulders and give much more progressive handling in the corners than a modern square shouldered tyre (unless you give your car adverse camber).
 
Yes they are built with modern compounds. you are not allowed to use the chemicals that they used historically when building tyres
 
If you want to go racing give your car some adverse camber and fit something like the Michelin TB5 road legal semi slick tyres http://www.longstonetyres.co.uk/page/16-53-13-michelin-tb5f.html that look like this.

 
but if you want to have the most enjoyable car to drive that when you press on in a corner, will drift predictably and progressively (rather than the grip, let go, grip, let go, of an over tyred car) then you want a tyre that has rounded shoulders, like the Cinturato http://www.longstonetyres...to-cn36.html that looks like this