If your GPA is more than 3.5 (from top universities) and your IELTS score is 7.5, it is likely that you can get into a more prestigious university like Warwick, Manchester, Edinburgh, York, King's College or even UCL, with a good statement of purpose.
Having said that, Newcastle University is not a bad choice. However, if you want to pursue a career in Literature, you must have a clear idea of where you're heading to, i.e. whether you want to specialise in literary theory, postcolonial literature, English literature (18th, 19th C or modern lit). If you cannot state your interest in the SOP, no university would want to accept you.
Each university has different areas of specialist. York is very strong in modern English Literature. Warwick is best known for postcolonial literature. Manchester, Edinburgh and UCL are famous in comparative literature and translation. Newcastle's interest is quite generic. Therefore you have to know what you really want to study before embarking on this route.
PS. If you're N'Jo, sorry for not being able to get online for a long time as I'm working at Uni most of the time. Feel free to send me an email I'll try to answer if I have time.