Hej,
Min fråga är kan man boka om hemresa när man är ute och reser? Jag har inte köpt någon ombokningsgaranti och flyger via British airways men köpt biljetten via en travel agent.

Tack,

If I made my booking with a travel agent, can I use Manage My Booking?

If you have booked through a travel agent and your booking contains at least one flight with a British Airways flight number, then simply use your travel agent's booking reference to access the Manage My Booking service.
There are two key service limitations, which may apply to a travel agent booking:

You may not be able to view all of your flights in Manage My Booking. If this is the case, then this is because British Airways does not own the booking and is normally allowed to view it's own flights plus with preceding and succeeding connecting flights (regardless of airline).
Changes made through Manage My Booking to British Airways flights will normally not be passed back to your travel agent booking.