After googling around for "Pearl River Bridge soy sauce", cancer, and cholropropanol, I discovered that is is old, and very probably obsolete, news.
Jenise's BBC news article is from June 2001. The UK (and other countries) did indeed ban a number of brands of soy sauce, including Pearl River Bridge, for a while. In fact I dimly recall a span of time some years ago when I couldn't find it in the shops in the US. The soy sauce manufacturers (at least some of them) changed their practices and the bans on the brands that comply with WHO regulations regarding cholropropanols have been lifted.
I found an English-language web page on http://www.china.org.ch
that says the four Pearl River Bridge products that the British tested and found non-compliant were counterfeits. They would say that, of course. But on the other hand, I have seen fake PRB in oriental grocery stores, with a label that is almost identical to genuine PRB.
Chloropropanols get into soy products (oyster sauce and hoisin sauce can also be affected) when chlorine is used to hydrolyze soy protein--a less expensive short cut than the traditional method. PRB allegedly doesn't use those short cuts.
Bottom line is, this is old news and the brands mentioned in the 2001 BBC article very likely are safe today. The problem is, while there's a lot of articles that list what was banned in 2001, it's hard to find out which brands corrected the problem and had the bans lifted.
Is there anyone out there in the UK, the EU, Australia, or New Zealand who can tell us whether Pearl River Bridge is for sale in shops in their countries? It is for sale in the USA.