By Jess Jones The chief executive of contract management company Docusign has said Brexit and British red tape have stifled dealmaking in the UK, making it much slower compared to the US. Allan Thygesen, who took over as chief in September 2022, toldCity A.M. that Brexit and the regulatory and compliance issues that have come with it “just adds burden” to operating in the UK, he said. His comments come as the firm looks to push into Europe and the UK, spurred by new research from the firm and Deloitte suggesting that fewer European customers are using ‘intelligent contract analytics’ than US c…