G-Research is often cited among the top quant funds in London, however it is hard to find more information. According to the following review on glassdoor from June 2014 they do not trade.
"In terms of work culture, according to what I have heard/understood from HR manager, G-Research is not really a hedge fund, but a R&D company which is in the business of outsourcing (body shopping) its services to several asset managers/hedge funds."
What then, makes them a top quant hedge fund? And what are my chances to join a realafter working there as researcher?