Please find below the Preparing for an Emergency booklet from Wiltshire Prepared. It is full of useful information on being as ready as you can for all types of emergency.
Also attached is a shorter, 3 day 'Be Ready' checklist, which has been prepared by the government to get residents ready for shorter, more basic needs such as power outages etc.
The overarching advice is to look after yourself and your neighbours as much as possible, but in an emergency dial 999.
For more advice, please go to Gov.uk/BeReady