This is awesome news. I hope it comes true, it will be a game changer for my long journeys. Mind you, the new Mansfield site looks like its well placed for a Cardiff/Newcastle run, being almost exactly half way. They kept that quiet - was it even on the 'coming soon' map? Seems to me that Moto, Welcome Break et al. are really shooting themselves in the foot with not allowing Tesla to set up at their services. There will now be 1000s of Tesla drivers diverting to a factory outlet store in Mansfield, and a myriad of hotels etc, and no longer stopping at the traditional services.
On the Tesla map situation - I'd love to speak to the person in charge of the map - it would avoid so much speculation if they'd just put on it what was going on e.g. - planned, awaiting planning, or - infrastructure upgrade underway or something like that. Wouldn't be hard.