Found by @twitaculous

This is a competition from Serenata Flowers Login To Enter »

WIN Fabulous Fresh Flowers! Follow @serenataflowers and retweet this message for your chance to win our gorgeous Pink Pearls bouquet. Winner will be picked by random at noon on 16th February. Good Luck! Twitter entries only. T&C

Sometimes promoters tweet more than once.
Tweets will only get updated when you re-fetch them. This helps you because competitions will no longer "jump" between pages when competitions get added or competitions finish while you are browsing them. Competitions get "fetched" when you login or manually re-fetch them with "Forget Ended Competitions & Fetch New Ones". Additionally hidden tweets will stay visible until you "fetch" to save reloading the page and save you from losing your position.