Tax Water services company Severn Trent has announced that it has secured its first Fair Tax Mark certification, making it the third FTSE 100 business to do so. The company joins a growing movement of businesses that demonstrate they are paying the right amount of corporation tax. The Fair Tax Mark is an independent certification scheme which recognises businesses that do so, and has certified more than 50 businesses, notably including Timpson, Lush, SSE, Richer Sounds and Co-op.