Thanks to everyone who has posted so much useful information on this group.
Hopefully this will help someone.....
Initially applied for a soft power DTV on the 13th August and got my visa approved yesterday, the 19th, so under 1 week.
Additional information I was asked for.....
A double page passport scan, I only scanned the main page.
An introduction letter explaining why I was applying for a DTV and proof of how I would fund the entire time.
A letter declaring I would not be working.
A letter stating I would not leave my country until the visa process was completed.
Thanks for all comments on my other posts.