Thanks for all the suggestions, guys.
I guess it could have been a moth flying across but it looked too long and too fast for a moth - could have been a very late season dragonfly maybe as they are fairly abundant here in the summer.
Good point about camera placement if I use two of them - thanks, I'll bear that in mind. Haven't yet checked what shots I've got from the latest placement but just hope the badgers haven't had the cam down and nicked it - if they have it'll be a couple of years till it resurfaces - you'd be amazed what's disappeared from the garden over the years only to appear around the Sett a year or two later.......
OK, so where do I buy a couple of lb of Hedgehog?
I liked the mushroom idea but can find no mention of Badgers eating them but squirrels, apparently, do eat fungi..... I'd love to be able to put down some bait for the Badgers to get some good close-ups but what I'm up against is this: judging from the videos so far, the badgers don't visit this part until about 2.30am - squirrels are around during the day (I've seen them eat every trace of what I've put down) and during the day/evening and night the fox is around. Both will, potentially, eat whatever I put down long before the badgers are around unless I can come up with something practical that badgers eat but neither of the others will have first. I can see the only way that's going to happen is for me to go down there about 2am and lay the stuff - not sure my Mum would be happy with that tho..