Cheapest time to put the washing machine on?

[Yankydoodledandy]

Is there a cheaper time use your washer?

Depends on your tariff.
Some offer cheaper electricity overnight.

Only if you are on Economy 7 tariff /time of use tariff.
www.comparethemarket.com/energy/content/is-energy-cheaper-at-night/

www.edfenergy.com/for-home/energywise/all-you-need-know-about-economy-7

No not on econ 7

Then no.

Unless you are on an economy 7 tariff then it makes no difference.

I'm on economy 7, so yes. The electricity at night is 3 times cheaper at night for me.
If you're on a standard tariff, then no. Sorry.