That's good you've been updated to waiting approval , I've been on waiting approval since 1st . It was a holiday on Monday and the embassy was closed so they've lost a day there too .
I submitted bio page in passport, a photo of me , proof of being in U.K and 3 months bank statements with a balance over the £18k . When I applied the status was document check then changed to processing pending approval, that was on1st October. I haven't been asked for any further documents. I check the E-visa portal daily and it's been on processing pending approval since 1st October.