Kirkpatrick & Lockhart Nicholson Graham has landed a lead advisory role opposite Linklaters on the sale of the Adelphi building on the Strand, in a boost for the firm's City real estate practice.

The deal, which is valued at around £300m, sees Istithmar Real Estate – an investment vehicle controlled by the Dubai Government – acquire the 340,000 sq ft Thameside building from brothers Bob and Rafi Manoukian.

Kirkpatrick advised the vendors, who are longstanding clients of the firm, with real estate partner Richard Smith and corporate partner Howard Kleiman leading the US firm's team. The sale is one of the largest deals on which Kirkpatrick – which also advised on their purchase of the building in 1988 – has advised the brothers.