Add how to display a listing of results

[jeddy3]

As a consumer I want to know how best to display a listing So that I can make my product consistent with others

Description

List of case studies, news articles etc.

Similar to promos/cards.

Links and resources

• https://github.com/barnardos/design-system/issues/91

Acceptance Criteria

• [ ] Add component
• [ ] Cross-browser tests
• [ ] Accessibility tests

[olimj]

@derekjohnson Can discuss around what we've done on the website and the categorisation label we've been using (news, service, event etc...)