When it comes to submitting short stories to UK magazines, like 'Mslexia', you should carefully read their submission guidelines. They may have specific requirements regarding the style and content of the story. You may need to register on their website first if they have an online submission system. Prepare your story in a professional - looking document. Proofread it multiple times to avoid any spelling or grammar mistakes. Also, don't be discouraged if you get rejected at first. Many famous writers faced rejections before getting published.
Most UK magazines that publish short stories have their own submission processes. Take 'The London Magazine' for instance. They often ask for submissions in a particular format, such as double - spaced text. You also need to pay attention to the word count limits. Some magazines might have a theme for a particular issue, so it's a good idea to check that in advance. Submitting your work early in their submission window can also increase your chances. It's all about following their rules precisely.