Advice for transitioning into HR

Hi all, 

Do people have any advice on how to transition into HR?  I live in London and have an MSC in HR as well as a level 7 Advanced certificate in Human Resources, but have been working in Project Management for the last 5 years.  Would anyone be able to tell me what routes are there to get into the industry i.e. any good job websites?  I'd welcome any advice. 

Many thanks,