Yeshiva L’Zeirem Tiferes Yaacov is usually known as Gateshead Yeshiva Ketana, although it now has an additional shiur, shiur Dalet, and a kibbutz.
Shiur Alef is for 14/15 year olds and, if I’m not mistaken has 3 parallel shiurim.
It is very structured, traditional yeshivish and is (arguably) the premier Yeshiva Ketana in Europe.
It was founded by HaRav Chaim Kaufman Ztvk”l. The Rosh Yeshiva is HaRav Ezriel Jaffe and other maggidei shiur are Rav Avrohom Osher Cohen, Rav Yaakov Moore, Rav Yehuda Leib Wittler, Rav Mordechai Steinhaus, Rav Zvi Bakst, Rav Boruch Shimon Barnett, Rav Nosson Connick among others.