Yes, that's what happens in all the companies in India. The reason is since most of the big software companies (Infosys, Wipro, TCS etc) are SERVICE-BASED companies, some engineer (probably in US or UK) might have written the code or implemented the design and they transition the knowledge to our software companies. So if there any bugs, engineers in India needs to test and solve the issue.
Since you have four years of test experience in Embedded Design, I think the companies that I mentioned above and a lot of other companies too have Embedded Systems unit.
For which company did you work in London ?