She added: “What might have seemed on the surface like just the latest bizarre social media post by an MP trying to live up to his reputation as a self-styled “comedian”, this post has sensationally backfired causing a lot of hurt.
“At best this was an ill-judged and poorly timed attempt at humour: at worst it was a direct and insulting reference to the victims of the Kingsmill Massacre forty two years ago to the day. Whichever the case, the hurt and offence caused is real and he needs to take responsibility for that. If it was the latter he ought to consider his position.
“I welcome the fact that the post has been removed and understand that he has subsequently issued an apology; however, I think he owes an explanation as to the original intent behind the post.
“He would also be wise to reflect on the impact which social media can have especially given his role and profile as an MP and perhaps think carefully before tweeting in the future.”