Insect and Spider Identification: Small, dark brown insects living in bathroom, 1 by Autobot

Autobot wrote:
Hi,
Sorry to bother you all again. My Dad just found this and asked me to try to get it identified. Unfortunately, he also has a tendency to kill any insect that he doesn't know, so i'm afraid this one is dead.
We've had a few them in our bathroom for some time. They seem to be nocturnal - I have only ever seen them when switching on the light at night.
They don't seem to be too bothered by the light, though.
Sorry about the picture. My Dad only took a few, and this was the best of them. I don't know if it can be identified from that, as it isn't a very good shot. But I know that if it can, you guys are the people to do it ;)
I can try and find some more and photograph those if necessary.
Thanks again,
~Autobot.