@Rob***
applications go through the e-visa website but are still reviewed and approved (or not) at individual consulates. Most consulates actually require substantially MORE documentation than the initial form applying for the DTV asks you for. They get back to you to ask you for these additional documents after you submit your application, there were quite a few of them. What exactly is required, depends on the consulate, some consulates also require things that are NOT on the initial list.
But regardless, that line you quoted simply doesn't mean what you claim it means. It says you need 500k, correct, you do. It says you three months statements, correct, you do. It does NOT say you need 500k for three months, and London doesn't ask for this. You read it one way, which is fine, and some consulates do also interpret it that way as well. But the consulate that actually issued my visa, does not interpret it that way.
@Andi **********
reported that London now requires the 500k to be there for 10 days, and to have the statements stamped. That's useful information.