Who is Line of Duty's Ryan Pilkington?

Line Of Duty viewers were sent into a frenzy when criminal-turned police officer PC Ryan Pilkington (Gregory Piper) returned in last night's episode. Here is everything you need to know about him... https://www.dailymail.co.uk/femail/article-9413857/Who-Line-Dutys-Ryan-Pilkington.html?ns_mchannel=rss&ns_campaign=1490&ito=1490