- Alexander Watson Estate Agents 28-30 High Street Pinner Middlesex HA5 5PW Telephone: 0208 866 0127 Fax: 0208 868 5159 email: sales@alexanderwatson.co.uk Welcome to the Alexander Watson website! Please click on one of the buttons above to: Browse our site for information about properties currently for sale If you would like to register your details with us For details on purchasing properties on ...www.alexanderwatson.co.uk