Right, so I said I'd answer this from first hand experience, here goes. I've only had a car for the past three years. So previous to that, pretty much all my shooting involved trains, the Underground, bicycles and taxis. The short version is that in about 20 years of that, I was asked one single time by a Rastafarian gentleman "what's in the bag, man?". "It's my kit, man". "Cool". That's my full experience of anyone caring. But I have also made a point of being discrete by not carrying around cases that are obviously guns, or dressing in my full wildfowling finery for example. I'm just a bloke on the Tube with a rucksack. I did look into all the various conditions of carriage but they're a mess of unworkable fudge, except for ScotRail who are at least clear. Some say you have to ask for permission 24 hours in advance but you can't because no-one at the other end is aware of this or wants to engage with it as there's no possible benefit to them of doing so. They're rather not know and them it's your problem. So be discrete, if you can have the gun attached to yourself with a rucksack or certainly always within your sight. If you sit at the end of carriages, no one can walk by without you noticing. And if you share a carriage with drunken football supporters, you become completely invisible. But much as it pains me to say it, I suspect this has worked fine for me because I'm a white middle-class chap. There is no way I would try it if I wasn't. It does make you realise you have this built-in privilege of an expectation of not being viewed with suspicion and the freedom to act that comes with it.
