Tri-Artisan Partners LLC, a New York-based merchant bank, has opened an office in London and formed a European affiliate called Tri-Artisan Partners Europe. Julian Hirst, former head of corporate finance at Panmure Gordon & Co., and Simon Hirst, former executive vice chairman of Panmure Gordon & Co., have become the joint managing partners of Tri-Artisan Partners Europe. Benoit de Biolley, previously a senior managing director of Deutsche Bank, and Jason Bentley Moran, former deputy head of M&A at Commerzbank, have joined the European team as partners. www.tri-artisanpartners.com