20 NOVEMBER 1971, Page 19

Sir: ' Since every Parliament is supreme, one parliament cannot

derogate from the powers of a subsequent Parliament.' — Hatsbury vol 33, p.377, Authority of Statutes:

Clearly, therefore, Edward Heath has no power to sign a treaty which does derogate from the powers of subsequent Parliaments. Furthermore, if he does sign it. it has no validity.

Dorothy Becker 194 Queensgate, London SW?