For British research, one of Ol' Myrt's favorites is Ancestral Trails. The Complete Guide to British Genealogy and Family History, Second Edition by Mark D. Herber.
If you plan a trip for onsite research, your work will likely take you to The National Archives (UK), where a friend Audrey Collins works. Her recent blog post A Sneaky peek at the new "Start Here Desk" shows how things are shaping up with recent revisions to layout and design at TNA. Thanks, Audrey.
What are your favorite UK research how-to books? Blogs?
Happy family tree climbing!
Your friend in genealogy.