Fawlty Towers - The Sudoku

This is such a brilliant idea from Peter C Hayward, who made this as a tribute to the great John Cleese. You can play the puzzle here:
https://cracking-the-cryptic.web.app/...

Rules:
Normal Sudoku rules apply. Additionally, there are 9 towers. Digits in each tower sum to the number shown below it.Digits in each tower increase in value from bottom to top. Except...2 of the towers are faulty, and do not increase in value, while another 5 towers do not sum to the given number. No tower is faulty in both ways.

Peter's discussion with John Cleese can be seen here:
   • I Met John Cleese Today  

@JohnCleese
#fawltytowers
#johncleese

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Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.

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