SDLTM33240 | Ordinary partnership transactions: Representative partners - Para8
From HM Revenue & Customs · Stamp Duty Land Tax Manual
Anything required or authorised to be done by or in relation to the responsible partners may instead be done by or in relation to any representative partner or partners.
A representative partner means a partner nominated by a majority of the partners to act as the representative of the partnership for the purposes of SDLT. Any such nomination, or the revocation of such a nomination, has effect only after notice of the nomination, or revocation, has been given to HMRC. Nomination can be made by letter to Technical & Guidance Team, the address can be found here