Q2 & Z visas

My wife is a Chinese citizen but our children and I, are British Citizens,,we have 2 multiple entry visa (Q2) which are currently not allowed entry, so I am applying for TEFL jobs and want to know if Z visas are currently being issued for British TEFL jobs. Also, do I need to have a degree to get a Z visa for teaching? Finally, is there any talk of when the existing visas will become valid again? thank you for any information.