This book is also American, and has mixed UK reviews, though reviewed well in the US. It's specifically on pregnancy for type 1's. It doesn't list blood glucose levels for the UK, only for the US, which would make it difficult. That said, it's the only book I could find specific to your needs right now - (though the above listed book, may go a long way toward meeting your needs; many reviewers reported improved control of blood glucose after reading the book)...
http://www.amazon.co.uk/372/dp/1932...alancing+Pregnancy+with+Pre-existing+Diabetes
If you get one or both books, I'd be most interested in hearing your review.