Gratuity for expat employees

Hi

Need inputs on the below situation:

Employees of holding company in U.K are transferred to a subsidiary company in India. These employees enter into an employment contract with the Indian company. They are also on the payroll of the Indian company.

In such a case, if an expat employee completes 5 years and returns back to the holding company, whether Gratuity is payable?

Thanks in Advance