Great Portland is boosted by a surge to the West End

Booming demand for West End shops and offices meant a strong surge in the value of Great Portland Estates' London-based portfolio over the past three months.

It rose in value by 3.8% between April and June and is up 14.7% on a year ago, which is better than the City expected.

"We are benefiting from the continued growing attractions of London as a major global city," said chief executive Toby Courtauld. "We had a key letting to Superdry in Regent Street and have had approval for our Hanover Square development over and around the Crossrail station."

Great Portland also revealed two major sales through its joint venture with capital & Counties.

A block on Kensington High Street and one on Kingsway have been sold £62.5 million and £16.6 million which was 10.5% and 9% ahead of book value respectively.

Courtauld said: "Demand remains high and we expect much of it to be unsatiated for some time to come."