Merge pull request #670 from nationalarchives/use-xml-parsing-for-fir… #4102

Job	Run time
terraform_format	6s
Run pre-commit	1m 38s
Run tests	1m 40s
terraform_lint	6s
terraform_validate	23s
tfsec PR commenter	20s
terraform_plan-production / terraform_plan	44s
terraform_plan-staging / terraform_plan	44s
	5m 41s

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