I couldn't find a text on line which provided the example of what I was looking for in a model persuasive letter. So I wrote one (and wish that i had done earlier as it was quicker)
This is a letter to the head teacher which tries to persuade them to get rid of school uniform.
It can be used as a model text to look at with the children to identify features and language.
It could be used a starting letter to be up-leveled and improved
We used it as the 'Imitate' text at the beginning of a T4W cycle
Hope you find it useful and it saves you some time.