Problems can occur in a residential lease if the original lease was poorly drafted or issued many years ago. This is because property law has changed significantly over time and, as a result, many existing leases do not comply with modern legislation.
Examples of defective drafts could be invalid rights of way over common land or complicated forfeiture clauses.
One solution to a defective lease is to apply for a deed of variation. However, this is an expensive process and is often subject to delays and setbacks.