To facilitate a book a deal with a traditional publisher then you will need to have a story coupled with decent grammar.
There are many books out there that do not have Nobel prize-winning grammar but they have enough.
As the artist, as the creator of your story, you are the one responsible for it.
Your work has to be at publication standard – free from basic grammatical errors.
Manchester Literary Agency will be looking to support you achieve the success you have worked towards.