Nothing announced so far Claire. All we know is Michael himself did say a while ago in a Q&A's session that he would be doing a full tour of the UK on 2018.
He is here in February to do "An Audience With Michael Bolton - My Life Story" but these are purely talking shows and will take the form of an interview.
When anything confirmed and announced Gail will post on the Dates Added thread as well as in Tour Section and on Main page here.
Hope that info helps !!! :)
Sylvia Your wee Scottish friend