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Science Sauce publishes science teaching and learning materials. There are plenty of learning videos that are ideal for revision and flipped learning classes, and there are some full flipped learning lessons for KS4 Biology (Browse the collection here). I publish worksheets and other resources as and when I make them. Some of my KS3 worksheets are published, and my pages for KS4 and 5 Biology pages are currently being worked on (they'll be published for the new school year, August/September 2019 if not before).
You can also follow Teach Sauce, my vlog/blog where I share my teaching ideas.