* The Royal Military Academy Sandhurst (RMAS): This is the primary commissioning source for officers in the British Army. It's a highly selective institution, not a school in the traditional sense, but rather a military academy for officer training. Cadets typically attend university before applying.
* Several other academies and colleges: There are other establishments that offer training for specific branches of the military or for roles within the armed forces.
Therefore, the answer depends on your definition of "military school." If you mean a school that directly prepares students for a military career from a young age (like some US military academies), then no, not in the same way. If you mean institutions that train officers or other military personnel, then yes, several exist, with Sandhurst being the most prominent.