Not every drawing revision matters
Architectural changes elsewhere in the project may have no Party Wall consequence.
Changes to notifiable work can matter
A different foundation type, deeper excavation, different support arrangement or additional work to the party structure can require proper consideration.
Ask for the revised information
Compare the original and revised drawings and identify the exact difference rather than objecting to a revision number in the abstract.
Focus on consequence
If the change affects risk, statutory rights or protections, raise it. If it does not affect you, there may be nothing useful to determine.
Key takeaway
A changed drawing is a reason to compare the works, not automatically a reason to restart the entire process.
This page provides general information about the Party Wall etc. Act 1996 and common practice. It is not legal advice and does not replace advice on the facts of a particular matter.