Geograph - photograph every grid square

This was the last mill to be built in Bolton, for Sir John Holden & Sons Ltd, in 1927 to the design of local firm Bradshaw Gass and Hope. It was designed from the outset to be powered by electricity, and would appear to have been intended to have been extended as a double mill to the north. The internal structure is of steel and concrete, but the mill is faced in brick with red terracotta detailing in a restrained Art Deco style.
Spinning ceased in 1965 and after a period as a mail order base, in 2007 work began on conversion to residential apartments. The conversion has had to take into account the fact that the building is Listed Grade II and the problem of achieving natural light penetration into the centre of a wide building.
The solution has been to create open balconies within the perimeter of the building so that the effective outside wall of each flat is well inside the building, and can be provided with windows. The balcony opening is then fitted with an open screen which mimics the pattern of the original fenestration.

Listed buildings and structures are officially designated as being of special architectural, historical or cultural significance. There are over half a million listed structures in the United Kingdom, covered by around 375,000 listings.
Listed status is more commonly associated with buildings or groups of buildings, however it can cover many other structures, including bridges, headstones, steps, ponds, monuments, walls, phone boxes, wrecks, parks, and heritage sites, and in more recent times a road crossing (Abbey Road) and graffiti art (Banksy 'Spy-booth') have been included.

In England and Wales there are three main listing designations;
Grade I (2.5%) - exceptional interest, sometimes considered to be internationally important.
Grade II* (5.5%) - particularly important buildings of more than special interest.
Grade II (92%) - nationally important and of special interest.

There are also locally listed structures (at the discretion of local authorities) using A, B and C designations.

In Scotland three classifications are also used but the criteria are different. There are around 47,500 Listed buildings.
Category A (8%)- generally equivalent to Grade I and II* in England and Wales
Category B (51%)- this appears generally to cover the ground of Grade II, recognising national importance.
Category C (41%)- buildings of local importance, probably with some overlap with English Grade II.

In Northern Ireland the criteria are similar to Scotland, but the classifications are:
Grade A (2.3%)
Grade B+ (4.7%)
Grade B (93%)

Read more at Wikipedia Link