Sources

OrCore Prep is an independent app by OrCore Ltd. It is not affiliated with, endorsed by or representing the UK government or any government body. Government advice is quoted with links to the official source.

Below is every official source we quote, grouped by where we use it. Each guide also lists its own sources at the bottom. Sources last checked 5 November 2026. Advice can change: always follow the official source and the emergency services. Call 999 if life is in danger.

A few non-government sources are used where no UK official figure exists (for example pet water needs from the Purina Institute, and portable water filter guidance from the US Centers for Disease Control and Prevention). They are labelled where we use them.

Tools and pages

Being ready for 3 days (72 hours)

The UK government's Be Ready campaign encourages households to be ready for 3 days. Our 72-hour figures, water amounts (3 litres per person per day) and kit lists follow it.

Food and water calculator

Water, calories and pet water amounts.

Power station calculator and power cuts

Fridge and freezer times, carbon monoxide safety, 105 and the Priority Services Register.

Grab bag and household plan

Kit lists, formula, knives and plan headings.

UK emergency numbers and warnings

Every number and warning service on our UK warnings page.

Flood warning check

Warning levels and where to sign up.

Preserving food and recipes

Fridge and freezer temperatures, bottling safety and rehydration.

Emergency call button, medical card and first aid

999 and 112, and the first aid advice behind our first aid guide and medical card.

Weekly drill

Every fact quoted in the weekly drill answers.

Barcode scanning

Product names for scanned barcodes come from the Open Food Facts database.

Open Food Facts (product names for barcode lookups; not a government source)