From Historic England entry:
“Formerly known as: St Andrew’s Parochial Schools HATTON GARDEN. Includes: No.8A ST CROSS STREET. Church, now offices. c1670 replacing St Andrews Holborn after the Great Fire of 1666, adapted as a Chantry School c1696, gutted during Second World War, rebuilt internally but facade restored. Erected by Lord Hatton, reputedly to designs by Wren.”
“Hatton Garden is a street and commercial area in the Holborn district of the London Borough of Camden, close to the boundary with the City of London. It takes its name from Sir Christopher Hatton, a favourite of Queen Elizabeth I, who established a mansion here and gained possession of the garden and orchard of Ely Place, the London seat of the Bishops of Ely. It remained in the Hatton family and was built up as a stylish residential development in the reign of King Charles II.
St Etheldreda’s Church in Ely Place, all that survives of the old Bishop’s Palace, is one of only two remaining buildings in London dating from the reign of Edward I. It is one of the oldest churches in England now in use for Roman Catholic worship, which was re-established there in 1879. The red-brick building now known as Wren House (see image), at the south-east corner of Hatton Garden and St Cross Street, was the Anglican church for the Hatton Garden development. It was taken over by the authorities of a charity school, and the statues of a boy and girl in uniform were then added.
Hatton Garden is famous as London’s jewellery quarter and the centre of diamond trade in the United Kingdom. This specialisation grew up in the early 19th century, spreading out from its more ancient centre in nearby Clerkenwell.
The Hatton Garden area between Leather Lane in the west and Saffron Hill in the east, and from Holborn in the south to Hatton Wall in the north, was developed as a new residential district in the Restoration period, between 1659 and 1694. It arose soon after the residential developments in Covent Garden and was contemporary with those of Bloomsbury Square.
Michael Flanders and Donald Swann, humorists in the 1960s and 1970s, celebrated Hatton Garden’s connection with the jewellery trade in their song of a sewage worker, “Down Below”:
Hatton Garden is the spot, down below
Where we likes to go a lot, down below,
Since a bloke from Leather Lane,
Dropped a diamond down the drain,
We’ll be going there again, down below.”