Other places worth a visit:
Bath/Longleat (watch her squeal with fear when she realises the animals aren't in cages
Wookey Hole/Cheddar Gorge
Windsor/Oxford/Cambridge/York (cities that look good, you get the picture)
Warwick Castle
The various London touristy things (the stuff you completely ignore when you live in London) like Buckingham Palace, Tower of London, Westminster Abbey, St Pauls, Madame Tussauds, London Dungeon
Tate gallery/British Museum/ Natural History museum
Hampton Court.
Cost of a day out in the Philippines, complete with high-end meal for two: £20
Cost of the same in England £150
The look of delight on your credit card company's face when they realise your costs have gone up sixfold just by moving to England: Priceless.