This plain but quite elegant building was designed by Michael Squire & Partners in 2001, and constructed with load-bearing panels. The sculpture is by artists Langlands & Bell, who specialise in this sort of thing.
I like it. It is a map of the surrounding streets - the building itself is at the intersection of the second and third panels up.
I've tried to match the pattern with a map and aerial photography from Google, but of course it is distorted by the camera angle from the street. Interestingly, the aerial photo fits the pattern much better than the map - perhaps the camera angle from the plane was similar.
The artists themselves describe the work as "a vector of cityscape. An axial section of the locality rising perpendicular to the ground in the form of a block and street plan in low relief. The city is upended and “re-presented” as a view from above on 5 storey's [sic] of the buildings [sic] facade."
More evidence that artists should let their work speak for itself - it is usually so much more articulate.