 Complete the following phrase:  By May 2014, nine aircraft had been delivered, completing the core fleet. Further deliveries were for a surge capability, available to the RAF when needed, but otherwise available to AirTanker for release to the civil market, less its military equipment or to partner nations in a military capacity with the MoDs agreement. By 14 March 2016, all 14 Voyagers had been delivered. In November 2015, it was announced that an RAF A330 MRTT would be refitted to carry government ministers and members of the Royal Family on official visits. The refit would cost 10m but would save around 775,000 annually compared to chartering flights. ZZ336 is fitted with 158 seats and is known as Vespina. It entered service on 6 May 2016, the then Prime Minister David Cameron made his first flight on it to attend the 