Be careful with Octopus Electric Juice, it’s a great idea but you still pay the same amount for the charge as you would using contactless (credit or debit card) with Ionity, that’s 69p kWh, if you have a car from one of the manufacturers involved with Ionity it will be much cheaper using the card you get from that manufacturer, & if you don’t then you can still use a ChargePoint card I think it is to get it at 58p kWh.
So yes, an Electric Juice card is a useful car to have (I don’t have one yet despite being with Octopus Energy), but all it saves is the hassle of having ever more cards, & the nasty deposit charges that most of the companies issuing cards charge.