Protests against LGBT lessons in schools have been hijacked by those with a “religious, extremist agenda” who are holding schools “under siege”, MPs have said, as the number of schools being targeted has grown. Anderton Park primary school, in the Moseley area of Birmingham, has become the latest site of demonstrations against the teaching of LGBT rights, following similar protests at other schools in the city. On Friday, the last day before the half-term holiday, staff were forced to send…