I got my DTV from the London Embassy and was required to show three months of bank statements, but I applied as a freelancer, not under soft power. My salary and savings are in separate accounts and I needed to show three months of statements for both of those accounts.

I think it’s on a case by case basis and you won’t necessarily be asked to provide the same. Send what you have, but be prepared to be asked for further documentation. I sent everything that was asked on the application, and was asked for more.