Just for info, because I found the group helpful. London office is currently less than 48 hour turnaround at present.
I submitted what they asked for on 17/10 at 13:30. I also included in addition, accommodation, return flight, and self assessment.
They came back the following morning around 10am asking for companies house registration. I submitted that immediately, and the visa was approved the following morning, just before noon.
Happy days 🙏🏼