I've been doing some DIY around the house and I've come into contact with what might be asbestos insulation, as well as an asbestos cement water tank. I have work to do in that room, as I want to renovate. How can I be sure it is asbestos, and if it is, what precautions do I need to take in order to keep myself and my family safe from the dust? My house is mid-1970s and I live in the UK.