I took a 3-days London Pass and comparing it to the sum of the individual tickets there is no saving as you cannot visit all of the attractions mentioned in the booklet if you want to enjoy them
(consider: Tower Bridge/Tower of London almost1 day, Thames boat cruise half day, Westminster and the surronding area half day, Windsor Castle 1 day).
Skipping queues is not a big advantage in April when London is not that so crowded
Also,we realised that some other minor facilities were not available
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