Thanks for your useful answer. The problem is that they have never answered my case-specific questions.SchnookoLoly said:You can try sending LVO a case-specific email. Otherwise there's not much to do but wait.
The posted processing time for London is 11 months from the time London receives your application for 80% of decisions to be made. That means that 20% of applications will take longer than 11 months. Your application arrived in London in January of this year, so it's only been in London for 8.5 months. In addition, you are non-visa exempt, and non-visa exempt applications take longer than visa-exempt ones. If you look at the spreadsheet, TooCareless1's application took one year. Heppster's took 8. EagleMan's is still outstanding. Togethersoon's took 9. DesiVoodoo seems to be the exception, taking only 6.
Without knowing more details about your application it's impossible to know what's going on. But you technically are still within London's processing time, and will be for another 2.5 months. Once you pass 11 months in London you can start getting on their case more.
As for saying that 'pending' applications take longer, that's not true. Just look at the spreadsheet and compare dates for 'In Process' to 'Decision Made'. Some are only a few days, others are a few weeks, others are a few months. There's no real pattern.
Send a case-specific email, then wait.
But I will send the extra document next week, although they have not asked me! and will let them know when it is arrived at LVO.