My wordpress site just stopped working

hello all my website https://www.ukpigeonracing.co.uk was working fine i have just added some more content on it and clicked publish and it just stopped working its trying to get me to downlad php files :S and i dont know why i carnt even get into wp-admin any help to get this back up and running asap be great please

The page I need help with: [log in to see the link]