I will just say “I want that one” in the spirit of Little Britain famous quote.
These look like Marley Modern roof tiles which have a minimum-pitch requirement of 17.5 degrees.
A standard Velux installation can go as low as 15 degrees but it’s not recommended.
You need to contact the Architect/Specifier, rather than blame the trades, because I think he has recommended the wrong model and wrong flashing kit for this solution. If I were specifying this job, I would have chosen this solution...
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