Simplify the following text for a Grade 11 native English-speaking person.
Original: The Home Secretary realized that the nation 's police forces were wedded to obsolete methods and needed the invigorating shake-up that the young chief constable had already delivered in Hertfordshire ; Scotland Yard must not be left out .
Simplified: The Home Secretary knew that the nation 's police forces were stuck to old ways and needed the shake-up that the young chief constable had already delivered in Hertfordshire ; Scotland Yard must not be left out .