template letter regarding progress of my application

Its over 10 months i applied for ILR but no response at all. I called them couple of times asking about my application progress, they reply saying that its still in pending. They suggest me to write a letter to the Liverpool office to enquire about my application.
Could anyone send me a template of a letter to home office requesting the progress of my application.

Many thanks

Why do you need template? Compose yourself.