Three weeks in the UK in the late spring, my husband, two daughters (11 and turning 12 during the trip), and I've got it all booked now (well, all the hotels):
Day 1: Arrive at Heathrow and rent a car, head to Dover and Canterbury.
Evensong at Canterbury Cathedral
Overnight at Victoria Inn, Canterbury
Day 2 & 3: Up through Cambridge to York. Overnight 2 nights at York Priory Hotel.
Day 4 & 5: Up from York to Whitby and to Alnwick Castle, then on to Edinburgh. Two nights in Edinburgh at the Duthus Lodge B&B.
Day 6: Over to Inverness. Premier Inn, not exciting, but practical. Culloden Battlefield, and surrounding countryside.
Day 7: On our way down to Glasgow, casting regretful eyes toward the Isle of Skye, because we can't get there this trip. Stopping at Onich for one night at Camus House B&B.
Day 8: On to Castle Levan, near Glasgow, and exploring both. Overnight at the castle.
Day 9 & 10: Down to the Lake District, with two nights at Mary Mount Hotel
Day 13: Cheddar Gorge. Premier Inn, Sidcot.
Day 14 & 15: Bath, Stonehenge, Salisbury, Byways Guest House, Salisbury.
Day 16 & 17: Cotswolds, Stratford-Upon-Avon, Oxford, Warwick Castle, etc., at Salamander House in Stratford.
Days 18-22: London - return car at Heathrow, and get into the city, staying at a Premier Inn. All things London, to the best of our busy ability.
Day 23: Up at the crack of dawn...back to Heathrow to fly home.
We're SO EXCITED.