Last time I checked, the default WPA passphrase for Virgin Media routers was always set to eight capital letters, making it trivially crackable with a reasonable amount of GPU compute.
My current default Virgin WPA password is roughly of the form lLlllNllllll (l - lowercase letter, L - uppercase letter, N - number), installed about a year ago, and I know from seeing another one that the position and quantity of the uppercase letters and numbers aren't fixed.
Great until, like our neighbours, you place the box in your windowsil facing into the room.