When viewed by Ethical Consumer in August 2017, Belu's website stated:
"We have partnered with the charity WaterAid since 2011 giving 100% of our profits to help to end water poverty. To date we’ve given over £2.2M, transforming 146,671 lives with safe water and sanitation. 100% of Belu’s revenues are from trading, we do not receive and grants or subsidies."

Reference:

http://www.belu.org (23 August 2017)