With the levels of recruitment on at the moment, you won't stay junior for very long, and day trips are easy to come by, only had 1 blindline in my time at BA. They're not the most popular trips as they usually carry low credit (ie you have to work more days to meet CAP) the higher credit day trips are usually hoovered up by more senior bods! For instance there are a few charters this summer that carry 9hr+ credit for one day's work, a typical GVA and back carries 4hr30 credit, so you get my drift. The other thing to remember is swapping is very easy at BA, all done online mutually between pilots on the emaestro system.