From the situation to a useful next step.
Here is a possible starting point. In a conversation, we can clarify the circumstances and agree my involvement.
Your selected situation
Small changes can add up to a different project.
Where we could start
I would gather accumulated changes and current constraints. I would help the parties establish where there is flexibility and what needs a separate decision before continuing.
What you would have
A list of changes, constraints and decisions needed to update the plan.
Who needs to be involved
The client, delivery lead and project commercial owner.
Roles and decisions
Estimates and commitments do not change automatically: the team and client agree them.
Prepare an enquiry
This is an editable starting outline, not a submitted enquiry. Add your own circumstances.