Thanks again to everyone who gave advice on this. I had a huge rush to get it submitted in time. I'll tell you why, because it may serve as a note and a warning to others submitting applications. I was using an online application form, if you've ever used one of these you'll know that typing large amounts of text into those boxes is fiddly. So I wrote my text in a word document, and planned to copy and paste it into the little online text box. However, when I came to do the copying and pasting, a message appeared telling me:
"20563 characters entered (max 7500).
You have exceeded the maximum number of characters allowed. Please revise your answer"
So I had to (very quickly, I was approaching the deadline) cut two-thirds of my text away!
So guys, take it from me, check if there is a word / character count on your online forms!