A mystery spider

Yesterday I found an interesting spider living in the bottom of our guinea pig hutch. I scooped it out carefully and took some photos. I'm not sure what the species is, so if anyone can help with that I'd love to hear from you! My guess at the moment is that it is a female Steatoda bipunctata but please correct me if I am wrong. This species is also known as the "rabbit hutch spider" which seems appropriate considering where I found it.