Paul practiced as a solicitor in Glasgow for several years as a commercial litigator before calling to the Bar in 2004. He has a broad practice primarily based around commercial and administrative law. Matters in which he has acted include contract disputes, trademark and patent litigation, restrictive covenants, professional negligence claims, warranties in the sale of businesses, and judicial reviews in areas including agricultural subsidies, fishing quotas and medical profession "alert letters".

He appears regularly in the commercial and ordinary courts, and has appeared in the Inner House both alone and with senior counsel.

Selected Cases

• Verathon Medical (Canada) ULC v Aircraft Medical Ltd [2011] CSOH 19
• Farstad Supply AS v Enviroco Ltd [2010] UKSC 18, [2010] Bus LR 1087, [2010] 2 Lloyd's Rep 387, 2010 SCLR 379
• Winding Up Board of Landsbanki Islands HF v Mills [2010] CSOH 100
• Morris Amusements Ltd v Glasgow City Council [2009] CSOH 84, 2009 SLT 697
• Melfort Pier Holidays Ltd v Melfort Club 2007 SC 243