Nickc – the singletrack is about a foot wide for most of it, I reckon. You really sound like you've not explored Swinley properly AT ALL. It's a top place to ride if you put any kind of effort in.
Re responsibility: when you are messing about in a quarry that just happens to be there, you are taking your own responsibility. At Swinly they have provided a load of trails for our use – because we are using something they've provided, we can in theory sue if it's not safe. If for instance they built a lovely swoopy bit of singletrack that led you round a blind bend and immediately off a cliff, that'd be their fault and you could sue (legally speaking and perhaps morally). They clearly haven't done anything stupid, however, but people are trying to exploit the law – which I am NOT CONDONING in anyway so put your flamethrowers away.
And I bought a permit using Paypal on my phone, and I could show the email to anyone who asked to prove it there and then.
£2 at reception and sign the list, takes ohhhhhhh 90seonds?
Only if you are there during the day, mate 🙂