Larvae?

[Sorbustree123]

We moved into a new place yesterday and have since found a couple of these upstairs in the house on the floor (see photos). Does anyone know what they might be? Should we be concerned and how can we deal with them? Thanks in advance.

I've no idea, but I'm curious. Is it an old house? Are they alive or dead? Were they in the middle of the floor or at the edges near the wall/window?

One was alive and moving across a carpet and the other was dead on a bathroom floor. It's a 1930s house that is in need of some updating but does have double glazing installed through out.