I do a fair bit in Lancaster and have only ever had one issueand that was with an argumentative drunk. I don't go out of my way to make eye contact but I don't hide either. Be discrete, dress discrete. If someone approaches you be yourself. Explain what you are doing. Ask them if they would like a copy emailing and if they get aggressive and won't be mollified, offer to delete the image. Very few images are worth getting in a fight for and the last thing you want is to get your gear damaged. Regarding the law, it use to be the case where you could photograph anything from public land. This changed slightly a couple of years ago to protect people from indecent snaps taken with mobile phones. Now, if someone feels you have taken an image which they deem is offensive, or if you post an image on social media and use it to demean someone, you are breaking the law. The problem is that the law left the definition of offensive down to the offended. All I do is avoid kids, anyone down on their luck or having a really bad day, shoot discretely and look like you have every right to be there, which you do. You are lucky. Cameras and street photographers are quite common in big cities, in Lancaster, not so much. Regarding gear, I use my KP and limiteds (21, 35 & 40) I also bought a super cheap Fuji X-E1 and an M42 adapter. Both are superb in different ways. Bottom line, enjoy it. Shoot light contrasts and wait for someone to walk through. Just have fun. Most of mine are just OK but I won a society comp outright with one and top scored with another so you never know what you are going to get, and therein lies the fun