Being an IP attorney is inherently a "European" business. I am a UK and European patent and design attorney. My business partner, Michelle, is a Registered UK and European trade mark attorney. We (mostly) deal with European law. We obtain pan-EU design and trade mark rights for our clients. I took bi-lingual European Patent exams in English and German. The list goes on.
As such, a UK exit from the EU is going to shake things up for us- and for our clients. I wouldn't want to try and sway anyone reading this either way, so our intention is to simply explain what we think would happen to UK companies' IP rights should we decide to go it alone.