The Yes Vote on May 22nd dominated the top Irish trends on Twitter this year.

It represents four out of the five of the top news topics on the social media site.

There were 400 thousand tweets sent with the hashtag 'Mar-ref', in the 36 hours after polling opened.

Twitter claims 2015's been a year of 'solidarity' on the social network.

In its review of the last 12 months, the Paris terror attacks were the most talked-about subject overall.

Helen Vaughan has filed this report looking back at the best trends of 2015.