Hello, I bought a flat in 2017 in Birmingham and lived there until I moved to London and bought a flat in 2020. I have lived here in London since and rented the Birmingham flat out in the meantime. I will be looking to sell my current London flat and hopefully buy a house. The Birmingham flat has been rented out since I moved to London so I think I will qualify for the Private Residential Relief but I am not completely clear on this. I sent a letter to HMRC on completion of the London flat purchase nominating it as my main residence but it was not acknowledged. Does it matter if I chase it up or not?