Arrested for ''abstracting electricity''

[Uther]

This is a new one for me, A man arrested for 'abstracting electricity' because he plugged his phone in to a socket on a London train. He was 'de arrested' later, which makes me think it was a made up charge, but then re arrested for being a bit of a tit about it...
http://news.sky.com/story/1518303/artist-arrested-for-charging-phone-on-train

 

[Uther]

If abstracting is actually an arrestable offence, why was he subsequently de arrested and then arrested for something else?