Would renaming early battlecruisers change their treaty treatment?

If Britain called its first-generation battlecruisers heavy armoured cruisers, would the Washington treaty still treat them as capital ships?

That would depend on how much negotiating effort and political capital Britain was prepared to spend.

Calling first-generation battlecruisers heavy armoured cruisers would not by itself settle their treatment under the Washington agreement. Obtaining a different classification would depend on how much argument and political capital Britain was prepared to commit to the negotiations.