i can say for sure that Gloucestershire implement sociology and psychology in year one into their Early Childhood Studies course (looking on the content i can access as a student that the general public cant) and but i dont know if you can pick and chose modules from another course like psychology. as year 1+2 all the modules given are compulsory. year 3 not all are. but just send an email to the uni and they'll forward you to the right person. they are all super helpful and email back normally within a day (apart from weekends)
call it bias, but its a lovely campus, everyone is so welcoming and the campus you'd be on looks like Hogwarts. Its small too, at only around 2000 students, but you wont see that many walking around. plus it is a specialist teaching uni.
if you want any more info, please do ask.