Tell clients about a price or terms change

I work in marketing at a private health clinic. Help me tell clients about a change to our prices or terms.

Context: Patients part way through a course, or on a membership or payment plan, read a price change closely. They want to know what happens to treatment already booked or paid for.

Before you start, ask me for anything missing from this list:
- What is changing, from when
- Who it applies to
- The reason
- Any notice period we must give

Then:
1. Say what is changing in the first two sentences.
2. Give the reason without apology or spin.
3. Say what stays the same and what the client can do.

Give me:
- The notice
- A short version for the website
- Likely questions with answers

Rules:
- Use only the facts I give you. Where something is missing, write [detail needed]. Never invent a number, a name, a quote or a source.
- Give general health information only. Never write anything that reads as advice on a person's own condition, and never suggest a treatment is certain to work or free of risk.
- Write in plain English, in our voice if I have given you a sample.
- Do not tell me what the rules or regulations say. If something may be restricted, flag it and I will check.

Finish with a list headed "Check before this goes out". Include these, plus anything else our clinical lead or the registered manager who approves marketing should see:
- The notice period and wording in your patient terms or plan agreement
- How the change applies to courses already booked or paid for
- Published prices on the website updated to match