Please give the Britons a new wonder, and not Aachen cathedral. How and why Ensemble ever decided on that I will never understand, but now is the time to correct it! I seem to recall that the Indian wonder was changed in Rise of the Rajas, so there is precedent for this.
There are plenty of possible alternatives: Westminster Abbey, Old St. Paul’s, Salisbury Cathedral, Rievaulx Abbey, etc.
The best choice would undoubtedly be the Tower of London, however.