Where the interest of the landlord in the dwelling-house passes from the landlord to another body after a secure tenant has given a notice claiming to exercise the right to acquire on rent to mortgage terms, all parties shall subject to subsection (2) be in the same position as if the other body—
If the circumstances after the disposal differ in any material respect, as for example where—
all those concerned shall, as soon as practicable after the disposal, take all such steps (whether by way of amending or withdrawing and re-serving any notice or extending any period or otherwise) as may be requisite for the purpose of securing that all parties are, as nearly as may be, in the same position as they would have been if those circumstances had obtained before the disposal.