ALAN MANN HELICOPTERS LIMITED 01006211 DUFF & PHELPS LTD 43-45 PORTMAN SQUARE LONDON W1H 6LY Private Limited Company Dissolved United Kingdom 1971-03-29 2013-08-13 30 09 2009-04-30 FULL 5 1 0 4 2852 - General mechanical engineering 6210 - Scheduled air transport