Last night I was commissioned to photograph a celebratory event to mark 150 years of English Heritage's Blue Plaque scheme at Dr Johnson's House in Gough Square, central London. It was a packed event with speeches from Sir Timothy Laurence, English Heritage CEO Kate Mavor and Chairman of the Blue Plaques panel, Professor Ronald Hutton. ©English Heritage, Lucy Millson-Watkins

I often get asked what my photographs are used for and where they end up, so I thought I would cover this in a blog post. When I undertake a creative brief with a client, one of the first questions I ask is what the key objectives of the photographs are and where they will likely be used. This gives me an idea of the format and aspect required as photographs are often needed to promote services, illustrate editorial, document an event or gain press coverage, and it useful to