I think there's a misleading 'and' in it. I think it should read:
SMBG should only be provided routinely to people with Type 2 diabetes who are not treated with insulin or sulphonylurea, where there is an agreed purpose or goal to testing.
rather than
SMBG should only be provided routinely to people with Type 2 diabetes who are not treated with insulin or sulphonylurea and where there is an agreed purpose or goal to testing.
I think that it is the "not" that shouldn't be there, so it should read ....
SMBG should only be provided routinely to people with Type 2 diabetes who are treated with insulin or sulphonylurea and where there is an agreed purpose or goal to testing.
Andy