"Although arrests for the alleged offences were slowly declining…

"Although arrests for the alleged offences were slowly declining until 2013, they peaked again in 2015. Included in the 857 section 127 arrests made last year were 139 cuffings for sending, or causing to be sent, "a false message to cause annoyance, inconvenience or anxiety” – a 71 per cent increase over the number of arrests made for the same alleged offences in 2011."

http://www.theregister.co.uk/2016/06/02/social_media_arrests_up_37pc_london_section_127_communications_act/