Hi,
I hold a nepalese passport with indefinite leave to remain in Uk and I am planning to go for holiday in hongkong for 2 weeks in this May and I was wondering to get a visa do I have to book and pay the flight ticket before hand or should I just book the flight and show the itinerary to the embassy? Could you also let me know how long does it take to get a visa as I am not a british passport holder and also how much money we need to have in our bank statement to prove that we can support our trip?
Please advise....

Thank you