Royston Vasey is the fictional town in League Of Gentlemen, as well as (non-coincidentally...) Roy Chuby Brown's real name.
As for Whitechapel, it was enjoyable enough. I didn't see the first series, so I was worried I might end up confused, but it seems like this series works standalone. I'm surprised that people might be confused about when it was set; the mobile phones and cars make it fairly obvious. (Although I did think the detective's office looked more like something out of Life On Mars or Red Riding than how I imagine the real thing would look like these days, but maybe that was intentional.)