If you need a new Washing Machine, I'm sure you already shop around, do your research, buy through a cashback website with a cashback or a reward credit card - but something that has been suggested to me is that we should look at the capacity of our chosen machine.
A 7.5kg Washing machine saves us around 92 washes a year compared to a 5kg capacity machine, thus saving electricity, water (and sewage charges), detergent and fabric conditioner!