What's a Chia or Flax 'Egg'?

You might have seen the puzzlement on the faces of the consumers on the BBC1 show 'The Customer is Always Right' when they read our instructions to make our mixes vegan. What's a Chia Egg?
We give the best options below for baking for keeping our mixes vegan.
1. Chia or Flax 'Egg'
This is a simple solution to using an egg in baking if you have some chia seeds or ground flaxseed on hand. Using a tablespoon of seed and 3 tablespoons of water per 'egg', you simply blend the two and pop into the fridge for 15 minutes. This will create a nice 'jelly' that works well as a binder in baking. This doesn't suit a light bake like a sponge but it works well in a denser style cake or brownie like our mix.
2. Aquafaba Chickpea liquid