Merge pull request #1202 from alphagov/email-regex #354

Job	Run time
Test Ruby	46s
Lint JavaScript / Run Standardx	10s
CodeQL SAST scan / Analyze	2m 17s
Lint Ruby / Run RuboCop	17s
Lint SCSS / Run Stylelint	17s
Security Analysis / Run Brakeman	13s
	4m 0s

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