Your Lease reserves the right of the Landlord to take possession of the property if you do not pay ground rent, service charges, insurance contributions, any administrative charges or otherwise consistently and significantly breach the Lease.
This is called Forfeiture.
Forfeiture applies whether payment has been demanded, or not.
If Forfeiture is pursued by your Landlord, your lender will be very concerned since the property is their security.
Your debt to your lender remains payable even if the landlord obtains possession of the property and you and your assets will be pursued by the lender.
Best not to breach the Lease terms.
Read more from Mail Online here on the subject of Forfeiture...