Hi Tasneem, When I say 'express permission,' I mean consent to use a photograph for a particular purpose. This might be granted by a marketing or PR person for the organisation, who's given you written permission in an email to use the image for editorial purposes.

Or permission might be granted on the Terms and Conditions of the website. For example, 'Visit Britain Images' allows writers to download images for editorial use. In the case of Visit Britain, the images must be used for the express purpose of promoting Britain as a tourist destination, and details on how to credit the images are provided.

I hope that helps. You need to be careful on recipe pics, millet, and basically everything! You can't even guarantee that the website where you found an image owns the copyright to it. They may well have purchased a licence from a stock photography site like Getty or Alamy, and be unable to give permission for you to use it.