I'm sorry to say Jacqueline that I think you're chances are virtually nil. 100% mortgages are difficult for people with unblemished credit files, and I'm guessing you've seen yours from the CRAs and have found problems ?(posted 7798 days ago)I would suggest your best bet would be to somehow try to scrape together the 5% deposit for a standard 95% mortgage - there are lenders out there who will consider you for this...numerous links on this website, although I couldn't recommend any particular one above another.
Not what you wanted to hear I am sure - and I hope someone else knows better than me !