@Neuth is right about what she's said with the exam boards
I was on AQA, and one half of the exam is based on your wider reading- you need a piece of poetry, prose and drama which you can use to refer to each of the 'contexts' of your course (we did Victorian literature, so this was stuff like women, poverty, empire etc- with about 6 contexts overall). You need to read these, make notes on them and learn some key quotes, as you can't take the wider reading texts into the exam.
At the start of the year, this looked absolutely petrifying! We all started trying to read as much as we could to fit it all in, but it did relax later in the year
As we'd finished our coursework texts in class, we started going over potential bits of wider reading in class rather than it being strictly 'wider' external reading. This made the workload a lot better
There is obviously a lot of writing, and your coursework will take a lot of fine tuning and drafts, but I wouldn't say it's difficult to keep up with
The only major problem we came across was if we were reading a novel for wider reading and it was taking ages- this can be aided with the use of online guides though