Small clay and sand cells found under a pot in our garden.
No interactions present.
I thought of potter wasp but these don't look like lipped pots. I have searched in vain on Google.
Have followed up those links. How fascinating. The wasp actually sometimes amputates the legs of the spiders to make them easier to carry to the nest cells. I've made sure the nest is back safe and sound covered up again, where I found it. I don't think we have a county recorder for wasps in Bedfordshire. Will try to find out....
If you look at the NBN map from the link above it shows one Bedfordshire record, and I've seen the adult wasp not too far away in Northamptonshire. This is possibly a species that is extending its range further north at the moment?
Entomologist and biological recorder
In addition to the recent records on iSpot, I have seen it a few years ago in Reading, making its pots on an egg box inside a regularly used moth trap!
Lat/Lng: 52.1, -0.3
OS grid ref: TL1848