Adrian Skinner (letters, page 23, 7 September) refers to statutory regulation of psychologists and to unregistered psychologists in the NHS. I belong to two chartered bodies, but see no reason why anyone should not use the general title of 'psychologist' or 'accountant' in earning a living. A general statutory regulation system for psychologists would be difficult to devise - given the variety of training routes and specialisms - and might lead to a failure to consider the exact requirements for a given NHS post.

Instead, the NHS could specify what qualification or professional membership is required for work in it, and what level of authorisation is needed for exceptions, without the complexity and delays of broad legislation.

Ian Enzer Bramhall Cheshire