examples of changes for which a sponsor note cannot be added are given in the current guidance as:
• the SOC code is incorrect;
• you have assigned it under the wrong tier or category;
• if you have given incorrect details for more than one of the following;
• the migrant’s nationality;
• the migrant’s date of birth;
• the migrant’s surname.
As far as the work end date is concerned it is expressly stated in the guidance that for restricted CoSs it can be changed by means of a sponsor note. For unrestricted CoSs the guidance is silent about this topic.
https://www.gov.uk/government/uploads/s ... _11_14.pdf