A well-written one stands out a mile and will get your application noticed for all the right reasons!
A personal supporting statement should show how you meet the skills and qualification and experience an employer is looking for. Don't be put off by the large blank space, this is an opportunity for you to really market yourself to the reader, so they're persuaded to invite you for interview!
How to approach writing a supporting Personal Statement
Only include relevant information referencing the keywords and phrases from the job description and person specification. Back up anything you say with mini stories as examples using the STAR method. Keep within the word or character count and use short examples.
Layout your statement following the criteria they are looking for, use headings so it flows logically, is easy to read and builds a really powerful impression.
You could include some of the following:
Don't forget to review it and refine it several times checking you have relevant and complete examples that have impact. Then get someone else to review it before you submit it!