Hmm, so it looks like you're using the JFBCContent plugin to add those social buttons to the site, but for some reason the Pinterest easy-tag is not rendering properly (but the other ones are)
1. Could you try going into the JFBConnect backend > Social > Misc area and adding a "Social Tag Admin Key" value?
2. Can you try directly adding that easytag to an article to see if there's a difference? If you add a key in #1, you'll have to add it like below:
{SCPinterestShare href=https://www.brackleycommunityhospital.charity/index.php/events/events/34-coffee-morning layout=standard image=https://www.brackleycommunityhospital.charity/images/Events/HintonCoffee.jpg desc=Coffee Morning in Hinton-in-the-Hedges Cricket Pavilion On Saturday June 8th. 10.00 - 12.00 am to your Events page. Cake Stall,... size=small key=YOURKEY}
3. Are there any other content plugins enabled on your site? Try ordering the JFBCContent plugin before them?
Let us know if there's any change after following these suggestions.
-Melissa