An investment firm focused on London's office rental market has seen a fall in supply and a rise in demand for City premises in the middle six months of the year. But uncertainty around the UK's exit from the European Union has dented the number of large lettings, it claimed.

McKay Securities, a listed real estate investment trust that targets the office and industrial rental markets in London and the southeast, said market conditions remained stable during six months to September 30. That was despite ongoing questions about the Brexit process, the firm added, as well as the unexpected outcome of the UK's general election, which saw Prime Minister Theresa May lose her party's outright majority.