United Kingdom

Lodging
National Trust
Landmark Trust
Crabtree and Crabtree (Scotland and Northumberland)
London Connection
Plum Guide

Transportation
Driving in UK @ Chris Orcutt
Rick Steves Guide to Brit Rail Passes etc.
Seat61 Guide to Train Travel in Britain

Meals

Ideas
Golden Compass @ Oxford
Tour Roman Britain @ the Independent
20 Superb UK Walks @ the Guardian
Top 20 Family Walks @ the National Trust
Lady In London

Northumbria & Yorkshire
Bamburgh Castle
Alnwick Castle
Dunstanburgh Castle
Durham Cathedral
Hadrian's Wall @ English Heritage
Hadrian's Wall @ National Trust
York Minster
The Shambles @ Amusing Planet
What a Shambles: a walk around York's ancient walls and alleys @ the Guardian
Yorkshire Dales @ Time Out
3 Days in the Yorkshire Dales @ Lady in London
Knaresborogh-Harrogate: Spectacular location (from the Guardian), quirky, Petrifying Well, Mother Shipton's Cave.
Sedbergh UK: From the Guardian. Fantastic countryside, bookstores, delightful small town between Lake District and Dales (Stonetrail Holidays)
3 Days in the Lake District @ Lady in London
Lady in London Day Out In Durham and Things to do in Durham
Grizedale Mountain Bikes
Yorkshire Sculpture Park
Kirkgate Market, Leeds

Oxfordshire
Visiting Oxford
Blenheim Palace
Minster Lovell
Warwick Castle
New College
Covered Market
Time Out @ The Cotwolds


London
Walk London
London Pass
Westminster Abbey
Trafalgar Square from Trip Savvy
Visting Parliament
Tower of London
St. Paul's
London Eye
Shakespeare's Globe
RSC
Tower Bridge
Harrods
Horniman Museum @ Time Out
Time Out Top 10 Museums for Kids