It is a yellow shell, Camptogramma bilineata
As a moth newbie (I'm guessing UK-based), I suggest you have a browse around that site; it really is very good (note that it includes distribution maps).
Also, Butterfly Conservation has a moth section
Also have a search for county-based moth groups - there are many with excellent web sites, such as
They often have real meetings, which would be a good reason you might consider joining you local one (I hope there is one in your area). Mothmen in your area will know good spots, local rarities, be glad to help with your ID and other mothy questions, and will also probably appreciate another pair of eyes (with which rarities might be noticed).