10 APRIL 1971, Page 36

The Concorde .

People whose arithmetic is good were against the Anglo-French Concorde development, and they may well have been right, on strictly arithmetical grounds, if their advice had been followed from the start. However, there is now a school of thought, to which I certainly subscribe, who believe that in evaluating a project of this magnitude, con- sideration should only be given to future expenditure—expenses up to now having gone for ever, whether or not the plane is to be a success.

Accepting this argument, the Concorde will be going into production, successful flight tests permitting, whatever the environ- mentalists in the United States should say— the route for supersonic planes so obviously being to the southern hemisphere, particu- larly the growing air routes to Japan and Australia.