In the past like Dom mentions the amount of time to process the paperwork and apply for a visa can vary. Both due to Phill events and british events.
You could plan everything like we did down to the last detail and the Embassy will change the way the application is handled. It worked in out advantage but meant it cost us more money and if i had not been able to send paperwork out at a moment notice may have caused a delay.
The waiting time used to be on the website it was one of my first qs on here why it was so high, but at other times it was a matter of a few weeks.
So make sure your flexible and not dependant on things happening smoothly.
