Job offer in Singapore

I wanted to qualify into the litigation department in London but have been offered a place in the corporate department in our Singapore office.

I am a final seat trainee and due to qualify in September. I wanted to qualify into the litigation department in London but have been offered a place in the corporate department in our Singapore office. Any advice on what I should do as I am worried that if I turn it down I might not be able to get a newly qualified role at another firm?