This page explains what immigration categories you can switch from in to the minister of religion category (Tier 2 Ministers of religion) of the points-based system to work in the United Kingdom if you are already in the United Kingdom.
The categories you can switch from
You can switch in to the minister of religion category from the immigration categories below:
If you are not in any of these categories, you must leave the United Kingdom and apply as a new application at your local entry clearance post.
This is the process an employer must follow before employing a person who is not a permanent resident of the United Kingdom if he/she is first required to show that no resident worker could be found to take a job.
Specific types of work that have been officially listed as ones for which there are not enough resident workers to fill available jobs. Employers who wish to hire a worker from outside the European Economic Area to fill a vacancy that is on a list of shortage occupations may do so without carrying out a resident labour market test.