More than a dozen companies have removed "unjust and unwarranted" terms for homeowners which make it difficult for them to sell their property, sometimes trapping them in unaffordable homes.
The competition watchdog said it had agreed with 15 businesses that they should release 3,500 leaseholders from contracts which saw their ground rent double in price every 10 to 15 years.
The businesses also promised to remove inflation-linked price rises that had replaced some of the original clauses which doubled rent.
