The Social Security System (SSS) does not have a physical branch in the UK. However, you can process your SSS benefits online through their official website or by contacting their overseas offices. It's a good idea to check the SSS website for information on the services available to overseas Filipino workers, including how to file claims or inquiries. If you need assistance, consider reaching out to the Philippine Embassy in the UK, as they can provide guidance on SSS-related matters.