of bigger, heavier aircraft types on BEA's (and other airlines') services to and from the island. The withdrawal of Pionairs from BEA's Channel Islands services on 20 March 1961 resulted in the transfer of operations from Southampton to Bournemouth to enable the introduction of Viscounts, which were too heavy for the former's grass runways. On 21 March 1961, BEA launched year-round Viscount services from Bournemouth to Jersey and Guernsey. 1961 also saw BEA's first dedicated pure freight services from both London and Southampton to Jersey. These were operated with "Leopard" class DC-3 freighters. The same year, BEA furthermore terminated its association agreement with Jersey Airlines as both airlines had become competitors on the prime London–Jersey and London–Guernsey trunk routes as a result of the Civil Aviation (Licensing) Act that had been enacted the year before. This had abolished the corporations' statutory monopoly on principal domestic and international scheduled routes. On 31 March 1962, BEA disposed of its minority holding in Jersey Airlines. The following month, Argosies replaced Leopards on BEA's London–Jersey freight run. In April 1963, most of the corporation's London – Channel Island flights transferred back to Heathrow as a result of the new competitive relationship between BEA and its former associate Jersey Airlines. The following month, BEA launched a London–Guernsey Argosy freighter service. On 1 June 1964, Vanguards made their debut on BEA's Heathrow–Jersey route. BEA subsequently introduced the type on selected services from Heathrow as well as Manchester. Between November 1965 and February 1966, BEA Helicopters temporarily operated S-61Ns on behalf of its parent company on the Jersey–Guernsey inter-island service while Jersey's runway was being resurfaced during daytime. On 1 April 1966, BEA resumed Southampton–Jersey services following the replacement of Southampton's grass runways with a paved runway suitable for bigger, heavier aircraft types such as the Viscount and Vanguard. Following a successful proving flight on 18 July 1967, BEA introduced Vanguards on selected flights serving Guernsey. On 31 March 1969, BEA withdrew its Jersey–Guernsey inter-island service, which was taken over by Alderney-based independent air taxi, charter and regional scheduled operator Aurigny Air Services. To improve the financial prospects of its loss-making Channel Islands operations, BEA established Channel Islands Airways Division in 1971. BEA's Channel Islands Airways division assumed financial and operational responsibility for all of its routes serving the Channel Islands except those serving the islands from Heathrow, Bristol, Cardiff, Leeds/Bradford, Liverpool and Newcastle. Isle of Man