The two statements that explain why the Contract Architect would be an appropriate Technical Coordinator are:

B. Has good leadership skills. D. Has a good, technical understanding of the work of the other professionals engaged in the project.

Rationale:

•B: Good leadership skills are essential for a Technical Coordinator, as they must lead the technical aspects of the project, manage the work of other professionals, and ensure that all technical activities are aligned with the project goals.

•D: A deep technical understanding of the work of other professionals involved in the project is crucial for a Technical Coordinator. This knowledge allows them to effectively coordinate various technical disciplines and ensure that the technical solutions meet the project's needs.

Being an external consultant (A) or an authority on local planning applications (E) might be beneficial but do not inherently qualify someone for the role of Technical Coordinator. Previous experience with the company (C) can be helpful but is not a defining reason for suitability in the Technical Coordinator role within an Agile team.