organic●ally™: Only UK/EU site that retails organic cotton hankies and other organic cotton goods like Fairtrade gift wrapper bags to replace single-use wrapping paper.
The Organic-Ally: Non-UK site that points you to Organic-Ally™ or similar goods nearer you to reduce airmiles flown by these goods.
I-SIS: The Institute of Science in Society is a good resource for the scientific basis of what's bad with what is seemingly harmless technology.
PAN-UK: Pesticide Action Network UK
Forums (are a wealth of information although sometimes you need to hunt around a bit for the particular advice you need. Start with doing a 'search'.