This caterpillar was on my silver curtain in my living room next to the back door. I have no idea how it got there. It seems to have a spur on its back and fine hairs. The stripe down its back is yellow and has red spots down the side aswell as a faint grey/white line. I would love to know what it is and also what it eats so that I can put it back in the right place. (I assume it was from my garden.) I live in south east England.