Windsor Castle discount voucher
Top tier attractions include Hampton Court, Kensington Palace, London Zoo, Kew Gardens, the Tower of London, Westminster Abbey, the Cabinet War Rooms/Churchill Museum and Windsor Castle.
The notable omissions are the London Eye and Madame Tussauds.
Note: most of the major museums and art galleries in London are free including the British Museum, National Gallery, National Portrait Gallery, Science Museum, Natural History Museum, Tate Modern, Victoria and Albert Museum, National Maritime Museum, Imperial War Museum and British Library.
Probability is that you will want to visit at least one of these.
Sometimes the London Pass lists one of the above free attractions as being covered by the London Pass. This will not be for admission but for something like an audio guide or a special exhibition.
Is The Transport Pass Option Worthwhile ?
The standard London Pass doesn't provide any transport facility apart from the hop on hop off bus on the first day and a River Thames cruise.
The longer the duration, the more money comes pre-loaded on the Visitor Oyster Card.
Crudely speaking the Visitor Oyster Card comes pre-loaded with enough cash to cover unlimited travel on public transport in the centre of London (zones 1 and 2) for the number of days you have purchased. If you travel outside Central London (zones 1 and 2), perhaps to Hampton Court or Heathrow Airport you may have to top up the Oyster Card with more cash, which is very easy to do at any Underground Station.
It may be cheaper to buy a standard Oyster Card on arrival in London separately to the London Pass. The Visitors Oyster Card comes with a non-refundable administration fee, the standard Oyster has a deposit that is refundable.
If you are staying in London more than 5 days, normally it will be cheaper to load a 7 day Travelcard onto the Oyster - this is only possible on the standard Oyster, not the Visitors Oyster Card that comes with the London Pass.
Note Children : Children under 11 travel free on buses and the Underground in London without a ticket (but not on the train to Windsor or Hampton Court).