Everything you'd need if the power, the internet and your phone were all down, on one sheet. Fill it in together, print it, and stick it on the fridge. Based on the official GOV.UK Household Emergency Plan.
Our household emergency plan
If the emergency is outside: go in, stay in, tune in (local radio and official advice). If it's inside the home: get out, stay out, ring 999.
Warning (from the official plan): you can turn the water and electricity back on yourself, but NOT the gas. That must be done by a qualified engineer. Check it every six months. From survivalnextdoor.co.uk, based on the GOV.UK Household Emergency Plan.