Link as hyperlinks external websites which already contain biographical information
I agree. We've tweaked it once, but it's not enough. I was thinking along the lines of a button, but the green palette colour could work too.
I was probably being a bit slow but the second link after clicking the External Website link isn't terribly obvious. Could it be the same green as the main link and possibly some text saying "Click to follow the link" or similar be added?
From a Life Story page, there is an option to "Add an external reference" which is designed to link to specific pages on other websites which contain further information.
For example, from my Great Uncle's Life Story (https://beta.livesofthefirstworldwar.org/lifestory/1276934) the sixth link down in the evidence list refers to a website dedicated to the Huntingdonshire Cyclist Regiment and shows my Great Uncle was a Sergeant in F company.
Hopefully this works how you would expect, but please do feedback further if I've misunderstood anything