Sarah,
I knew Pete Tait and Mike Gillet but I cannot place your father even though I was a Nav Rad on the Sqn next door. (12(B)).
If you browse the Did You Fly Vulcans thread you will find some information about this crash. At the time I was at Waddington.
Your father did not 'serve' on Vulcans in Singapore in the then accepted sense of the word.
The Cottesmore Wing held the Far East reinforcement mission from 1964 through to about 1968 when the task was switched to the Waddington wing and all the aircraft were swopped over too. The Cottesmore wing then moved to Cyprus to become the Akrotiri Bomber Wing.
The Singapore task was for up to 24 Vulcans to deploy to RAF Tengah in Singapore where there were two purpose built squadron facilities. The crews were planned to fly either via Cyprus, Bahrein (overflying Turkey and Iran) thence to Gan and Singapore. Alternatively, in case the 'Eastabout' Route was not possible for pilitical reason there was also a 'Westabout' route via Canada, the USA, and Guam.
I do not know how often the mission was practised but I know of one eastabout from Cottesmore in Apr 65 with, if I recall correctly, 8 aircraft from 35 sqn. It is likely that IX would have done a detachment the following year. These exercises lasted some 4-6 weeks.