The Queen and Prince William have travelled to Porton Down today, to meet scientists involved in the country's Covid-19 response as well as the aftermath of the Salisbury poisonings.

Here are 12 pictures from their secret visit to the Defence Science and Technology Laboratory (Dstl) - the Queen's first public engagement outside of a royal residence in seven months.

The Queen's visit is the third Royal engagement in Wiltshire in just one week - you can see a video below: