No, he can't. Home rates don't have anything to do with citizenship, necessarily, they have to do with where the student was physically living for the three years before their courses begin. If a UK citizen were to spend a year living in the US, for example, they would not be eligible for home rates when they returned to the UK.
However, don't EU citizens, regardless of where they live, pay lower rates than non-EU? Not sure about that, but you could check.