From their website "The Westminster Foundation is an independent grantmaking trust and registered charity, representing the charitable interests of The Duke of Westminster and Grosvenor businesses. We provide long-term sustainable help to vulnerable young people by working closely with organisations supporting families, schools and local communities."
We're not sure how the Pensioner statue fits in with these charitable aims, and we could find no reference to it on their website.
This section lists the memorials created by the subject on this page:
Westminster Foundation
Commissioned by the Royal Hospital Chelsea to commemorate the Second Millenni...
Courtier. Born at Boughton, Northamptonshire. In 1709 he became Master of the Great Wardrobe and officiated at the coronation of King George I in 1714. Wife was Mary Churchill. A benevolent person...
Born Southampton. A prodigy, the youngest ever pupil at the Royal Academy School. Co-founder of the Pre-Raphaelite Brotherhood. His friendship with Ruskin did not survive marrying the ex-Mrs Ruskin...
John Cyril Lees Collingham was born in 1865, the second of the six children of Joseph Mawer Collingham (1832-1902) and Jane Eliza Collingham née Lees (1836-1919). His birth was registered in 2nd qu...
"a few freemasons of the Eastern District of London" in 1911.
A pdf from RBKC tells us that SFK is "Mrs Kirby, who sponsored nine other drinking fountains in London".