I found a good viewpoint at Podium level, underneath Crescent House. At ground level a woman ran circuits of the tennis courts. After a while she started doing interval training: running up and down the stairs near where I was standing. Then she came and asked if she could see the picture.
Cullum Welch House is named for Sir George James Cullum Welch O.B.E., M.C. He was Sheriff of London, then knighted, then Lord Mayor of London in 1956, which was when the Golden Lane Estate was being built. He was knighted in the 1952 New Year Honours. He served in the army in 1914-18 and 1939-45 conflicts, and gained the rank of Lieutenant-Colonel.
Cullum Welch House and Great Arthur House, together with other buildings in the Golden Lane Estate are listed Grade II. The listing was in December 1997. Here is an extract from the listing on the Historic England site.
REASONS FOR DESIGNATION: Cullum Welch House, part of the Golden Lane Estate, is designated at Grade II for the following principal reasons:
* Architectural interest: as a self-sufficient ‘urban village’, in which every element of space is accounted for and every detail carefully considered, the Golden Lane Estate has claim to be the most successful of England’s housing developments from the early 1950s.
* Planning interest: the estate reflects the formality, mixed with picturesque attention to landscape, which was emerging in British architecture in the early 1950s, this saw the spaces between the buildings being almost as important as the buildings themselves.
The strong formality of the estate became a key characteristic of the work of Chamberlin, Powell and Bon, as did the provision of a wide range of facilities on the site other than just housing. These are features that can also be seen at their Barbican development.
Here’s the description of Great Arthur House from the Historic England website:
Great Arthur House was built in 1953-7 from reinforced concrete. The 17 floor building was the first to break the London County Council’s 100 ft height restriction and was briefly the tallest inhabited building in England. The flats were designed for single people and couples such as nurses and policemen who had to live near their work. The architects for the estate were Chamberlin, Powell and Bon.
It was cold when I drew the picture, 10 degrees C. I wore a hat and gloves. Here are photos of work in progress, and a map.
Preliminary Sketch: working on the perspective lines 
Pencil 
This picture took about two hours overall, plus 15 minutes for the preliminary sketch.
The colours are Perylene Maroon and Prussian Blue, which make the grey tones, plus Hansa Yellow Mid which is the exact colour of the yellow cladding on Great Arthur House.
Here is a collection of my recent drawings of the Golden Lane Estate. Click on the picture to read more about the picture.
Jane Sketching 