An instrument effecting a land transaction is not subject to
Stamp Duty if the transaction is a Stamp Duty Land Tax transaction
by virtue of FA03/S125(5)(a). See
SDLTM49600a.
If a conveyance is within the charge to Stamp Duty there is
no charge to Stamp Duty Land Tax. See
SDLTM49600b.
FA03/SCH19/PARA8 makes similar provision to FA94/S240 whereby
if an agreement for a lease
then the agreement is treated for the purposes of the Stamp Duty Land Tax provisions relating to interest and penalties as if it had been executed on the same date as the date the lease was executed.