advice on employers sick pay

Hi I have recently been diagnosed with cancer in the breast and lymph nodes and due to start treatment in a couple of weeks. i am employed but its only a small company and we dont have a hand book so i am unaware what the sick pay will be. I am taking 1 year of work so obviously finances are a concern. My employer said they will let me know this week what my sick pay will be but i just wanted to ask what kind of structure other employers offer so i have an idea of what i feel they should be offering me. Its only a small company with around 30 employees