While I'm excited to see this venture, it hardly qualifies (yet) as a fully fledged seminary from an international perspective. It may provide an opportunity to train some of their own future ministers locally, but for now it seems that they have only a handful of students. I hope that day will come, but it's not there yet.
Of course, the reason for its existence is the dearth of such places in Britain (and Europe more broadly). I've sometimes heard it said that if you took all of the expat Brits teaching at American seminaries, and sent them home you could staff a pretty fair British institution. The problem is that there is no such British institution. In England, the options are primarily Anglican schools like Oak Hill or Wycliffe Hall, which would be broad evangelical, or small institutions like London Theological Seminary, which would use primarily adjunct instructors who are pastors. In Scotland, you have Edinburgh Theological Seminary (formerly Free Church College) as well as another micro seminary in the Free Church Continuing Seminary. Highland Theological College would be more conservative than the four old Universities. In Wales, you have Wales Evangelical School of Theology. In Northern Ireland, you have Union Theological College.
Continental Europe is similarly challenging. I know of a small Reformed seminary in Aix en Provence in France, Martin Bucer seminary in Germany, and Baltic Reformed Seminary in Latvia, though there are probably other small ventures. There are some denominational schools in the Netherlands, which might qualify.
None of these would be comparable in size or academic excellence to any of the top ten Reformed seminaries in the US for MDiv level education. Which is why those students from Britain who are able to do so tend to come to the US (as I myself did 35 years ago).
Post-MDiv level education is a different story: there are plenty of excellent places to do PhD studies in Europe, if you have the money. But most of them would not qualify as "believing in the authority of the Scriptures".