Sorensen was forced off at half-time with a neck injury and, after the re-start, Villa immediately looked to test his replacement Steve Simonsen with a series of aerial balls into the box.
Armitage made his Test debut in 2008 but has recently fallen down the pecking order and was used as a replacement during the November Test series with Northampton's Ben Foden taking the number 15 jersey.
The experiment, which BBH ran to test a potential replacement for homeless newspapers raised eyebrows with critics who felt recruits weren't being treated with respect.