Peppa Pig is a British Preschool animated series. During circa 2002, a pitch pilot was made and pitched it to Nick Jr. UK and Contender Media, the whole video is found, but before it happened, there is only one piece of footage was found on an Australian promo for Nick Jr, where one clip shows where Peppa lays on the floor, giggling from the intro and at the end. Although the pilot was never aired, it was screened at a "Cartoon Forum" convention event at Snowdonia, Wales in 2002, and again at the Phil Davies interview at London Animation Club convention event in 2017, the differences from the pilot is the character Peppa Pig herself was originally meant to be described "cheeky and slightly bossy" little pig.
UPDATE: The pilot has been found in this video! https://youtu.be/mfDs20Ys57c?t=720
ANOTHER UPDATE: More footage of the pilot was found at a different angle along with the Ben and Holly pilot! https://youtu.be/e82_FABpwEl