do I need a work Visa for HK

I holder a UK passport and will be working in Hong Kong , employed and paid by a UK registered company who are contracted by a Hong kong company to provide a consultant for a company set up for around two years I will live in HK for 2/3 months at a time, leaving to see clients over asia during the period Do I need a permit, being that I am not employed by a HK company but the UK company