If you’ve used Jimmy Brings you might find there’s some credit in your voucher vault. It expires on the 17th October!
This is because they are ending their loyalty scheme: — so partial credits have been turned into their value, you don’t need to do 8 orders.
In my case it was enough to be worthwhile despite the delivery fees, but I probably won’t be using them again, given they seem to have silently ended this. They were only worth using because of the occasional free order.