SDLTM04100 | Scope: How much is chargeable: Non-cash consideration: New lease granted on the surrender of an old lease FA03/SCH17A/PARA16
From HM Revenue & Customs · Stamp Duty Land Tax Manual
Where a new lease is granted in consideration of the surrender of an existing lease between the same parties
the surrender does not count as chargeable consideration for the grant
the grant does not count as chargeable consideration for the surrender