From a February 2019 government briefing paper on teacher recruitment:
In response to a parliamentary question in February 2017, the Schools Minister, Nick Gibb, provided information on a pilot to recruit qualified maths and physics teachers from overseas. The STEM international recruitment programme helps schools in recruiting maths and physics teachers trained in Australia, New Zealand, Canada and USA. All statefunded secondary schools can access the programme, with the DfE funding the recruitment costs and an acclimatisation package. The school is responsible for paying the teacher’s salary. Further information is available in guidance published by the Department for Education. The Government has also stated that the increased demand for languages teachers as a result of the EBacc will “in small part be filled by recruiting from other countries.”
It is highly unlikely that many of these teachers will earn £36,700. Currently, approximately 16% of teachers are trained overseas.