Today, you will be planning your formal letter to the Prime Minister, Boris Johnson. Use the excellent planning frame to help you. Remember to plan in enough detail so that you can write a brilliant letter tomorrow. However, as with any plan, you don't need to write in full sentences. Save that for the actual letter.
Have a look at the GOOD letter (the second one in the WAGOLL document) to remind yourself of how to write a great letter.
Happy planning!