This new site doesn't appear in the Electroverse app yet for me...I think what happens in the Electroverse app is you choose a stall then you get a prompt on the app to plug in. This prep would hopefully override the plug and charge workflow. I don't know for sure though.
It's not a huge discount either. I'm on the 8% discount through IOG and looking at the rates on their other locations, it's 60p/kW. Although I notice the pricing for Keele SuC (relatively nearby) has now crept up to 55p at peak times.