We moved here over 20 years ago. It's a typical suburban house in a street full of houses all the same, near Esher in Surrey - proper commuter belt. There are semi-urban foxes all around - I know of at least two other dens within a half-mile radius, and I'm sure there are many more. Driving home late at night you can guarantee to see half a dozen foxes crossing the road - mostly they're quite careful of traffic and look both ways before crossing, perhaps that's natural selection at work but it's rare to see one killed on the roads here.
It's a long, narrow garden (about 80m long), and the shed at the end was there when we moved in; it's very big for a shed, we were told it used to be a scout hut and it's certainly big enough. It's full of the usual junk - rusty barbecues, garden tools, wheelbarrow, mower, that sort of thing.
Ever since we moved here there have been foxes under the shed on and off, and the end of the garden has always been a popular spot with them. We have three black labs, however, and of course they don't like intruders so they chase off any foxes, squirrels or cats they find in the garden. A few years ago I put up a fence beside the shed, so the dogs can't get to the end of the garden any more - since then it's become fox heaven.
I've tried various remote cameras in the past, and got some quite nice (SD) footage of foxes taking eggs etc that I'd put out to bait them in - http://www.youtube.com/watch?v=6ZDZWoRvG6s
This vixen moved in under the shed during the cold weather last winter - I noticed signs of digging, and her footprints in the disturbed soil - and I captured some night-time footage of her using a Dogcamsport bullet camera wired to my mac with a long a/v cable. Then I got talking to Bushnell and ended up trying one of their cameras. The vixen became very relaxed about the camera, and would happily take food from around it - I even placed some tasty treats on top of the camera, which she took - http://www.youtube.com/watch?v=li7LEXGJi7I
Over the last few weeks it's become clear that cubs were likely - the vixen has spent more and more time below ground, and there have been visits from dog foxes; the smell has been terrible! I moved the trailcam in near the entrance to keep an eye on things, using a handily-placed tree to provide support and help it blend into the surroundings.