On the SOAS campus in Bloomsbury is a small plaque unlike any other in London.

The building in Thornhaugh Street is the only one in London to bear a sign apologising for being built.

On the front, facing towards Russell Square, a plaque reads: “The University of London hereby records its sincere apologies that the plans of this building were settled without due consultation with the Russell family and their trustees and therefore without their approval of its design.”

UCL erected the building in 1988 as the Brunei Gallery – an extension to the School of Oriental and African Studies which operates as “an exciting venue in Central London…[hosting] a programme of changing contemporary and historival exhibitions from Asia, Africa and the Middle East”. On top is a Japanese roof garden.

All very unobjectionable, you might imagine. You’d be wrong.

The University is on land which is managed by the Bedford Estates, a trust which benefits the descendents of the aristocrats who bought up the vast empty fields of what would become Bloomsbury three centuries ago.

In 1669, the huge Bloomsbury Estate came into the ownership of the Russell family through marriage. Their land stretched from present-day Euston Road to the north, Tottenham Court Road in the east, and all the way down to Covent Garden to the south – a nice accompaniment to Woburn Abbey, which had been gifted to them by Henry VIII following the dissolution of the monasteries. The Russell family, who were given the title of Duke of Bedford shortly after they came into possession of the land, remain the owners of much of the area to this day.

Piecemeal building schemes continued throughout the centuries, but in 1893, the 11th Duke, Herbrand Russell (1858-1937), felt political and popular feeling was turning against the owners of the large London estates, living as they were in a manner which was entirely alien (and alienating) to most of the population. Worried that their visibility and proximity to the masses might make them vulnerable, he made the decision to sell the majority of the family estate to developers, although many of the pre-exisiting developments remained in the family’s vast property portfolio.

Herbrand Russell was for many years the President of the Cremation Society of Great Britain, and was credited with saving the native Chinese milu (or Pere David deer) from extinction by breeding them in Woburn Abbey, but his grandson, the 13th Duke, John Russell could find little positive to say about him: “a selfish, forbidding man, with a highly developed sense of public duty and ducal responsibility, he lived a cold, aloof existence, isolated from the outside world by a mass of servants, sycophants and an eleven-mile wall.”

One of the many institutions who bought land from the family in the 1920s was the University of London, in an era which saw the tone of the neighbourhood shift from the residential to the academic.

Throughout the twentieth century, the Georgian houses were taken over by publishing companies, who converted the decent-sized rooms into individual offices. On the other side of the road from the Brunei Gallery are the former offices of Faber and Faber, a blue plaque dedicated to one-time employee TS Eliot upon the wall.

While the Russell family have long been unable to prevent the British Museum and the University encroaching into their estate, as educational institutions were given the legal right to compulsarily purchase land when they needed to expand, one of the conditions of sale was that the Bedford Estate retained the right of approval on buildings which fronted onto certain viewpoints.

And one of the viewpoints they have approval on is when buildings – just like the Brunei Gallery – face onto Russell Square.

The Bedford Estates were consulted in the early days of the SOAS project, but, in their words, “the university slightly pre-empted the issue”, and the design was fixed without the consent of the Estate. Thus, when the University set about leasing the new building to SOAS, the apologetic plaque was demanded by the Bedford Estate, who specified the exact wording, size and materials to be used.

Underneath the apologetic notice is a plaque noting that the actual design of the building was never really an issue: it won a Civic Trust Award 1988. The Trust awards “do not simply reward good design, but also take into account the way in which schemes relate to their settings and to the people they serve.”

Essentially, the only reason the plaque is there is as a point of principle.

The current Duke of Bedford is the 15th, who succeeded to the title in 2004. Today’s Bedford Estate consists mainly of “residential property converted to office and small hotel use and private residential property.” It also includes lock-up garages and a number of squares, both public and private.

That list rather downplays the scale of his empire which the Sunday Times estimated in 2011 had given him a fortune of over half a billion pounds.

And, since 1988, a prime view of London’s sorriest building.