Hi Hiri, My wife application was received by UKVI on 6th Feb (one day before mine although I posted on the same day), and on 14th March she's got back her passport with the ROA attached inside as well as a letter. We did supply a Special Delivery envelope for the return though, so she signed for it....

Hi there, I'm also still waiting for my ROA after nearly 4 months! UKVI received and processed my application on 7th February and I am still waiting for it today (nearly June!!). Interestingly, my wife's application sent on the same day as mine (but in a different envelope) was completed successfull...