Thanks for your reply.

I have one more question: Start date on the COS is 15 October. Can I start working with the new organization before this date?

Hi,

I am planning to change my employer. I am on Tier 2 general visa. I have the appointment with the home office next week for a visa.
Can my current employer retain me by providing a counter offer after I got a new visa from my new employer?

Please help.