The original long windows in the north aisle were reduced in size in 1782 because of the noise from the neighbouring Billingsgate Fish Market. The resulting seven circular windows all contain stained glass. The window in the sacristry at the west end contains glass of 1671 from Plumbers’ Hall in Chequer Yard, Bush Lane, which was demolished in 1863 to make way for Cannon Street Railway Station. The remaining six windows contain glass by Alfred L. Wilkinson (1899-1983) dating from 1952 to 1960. These show the arms of the Plumbers’, Fishmongers’ and Coopers’ Companies together with those of William Wand (1885-1977) when Bishop of London and Geoffrey Fisher (1887-1972) when Archbishop of Canterbury and the badge of the Fraternity of Our Lady de Salve Regina.
Coat of Arms of the Worshipful Company of Plumbers 
Coat of Arms of the Worshipful Company of Fishmongers 
Coat of Arms of the Worshipful Company of Coopers 
Coat of Arms of Geoffrey Fisher when Archbishop of Canterbury 
Coat of Arms of William Wand when Bishop of London
St Magnus serves as the livery church of Fishmongers’ and Plumbers’ Companies, as well as the Ward church for Bridge Ward.
The link with the Coopers’ Company arises from the terms of the Will of Henry Cloker (died 1574), which specified that an annual service should be held at St Michael’s Crooked Lane (transferred to St Magnus when that church was demolished). The heraldic arms of the Fishmongers’ Company are also displayed on a shield at the west end of the south aisle.
Alfred Wilkinson was the son of Horace Wilkinson (1866-1957), also an artist working in stained glass, who was frequently employed by the architect W.D. Caroe, a Past Master of the Plumbers’ Company. The Coopers’ window was donated by Barnabus Russell, who was Master of that Company in 1943, as a thanksgiving for the preservation of his five sons and son-in-law from the perils of war. Russell persuaded the Fishmongers’ and Plumbers’ Companies to donate their own windows, and the service of blessing was carried out on 30 October 1959.
Blazons of armorial bearings displayed in the windows
The Worshipful Company of Plumbers
Shield: Or, on a chevron sable between in chief a Jacob’s staff of the second between two sounding leads proper, and in base a water level also sable, two soldering irons in saltire between on the dexter a cutting knife and on the sinister a shavehook argent.
Crest: On a wreath Or and sable, a fountain argent, garnished and on the top thereof an archangel holding a sword and a balance Or.
Supporters: were not granted to the Company until 2003, so are not shown in the window. In that year the Company was granted: On the dexter side a representation of the Master of the Worshipful Company of Plumbers habited proper and on the sinister a representation of the Beadle of the Worshipful Company of Plumbers habited and holding with his sinister hand his Staff of Office proper.
Badge: On a pellet a fountain Argent garnished Or surmounted by a representation of the Archangel Michael holding in the dexter hand a sword and in the sinister hand a balance Or between two sounding leads Proper.
Mottoes: (Over the arms) Justicia et Pax; (below the arms) In God is all our hope.
Arms granted on 24 November 1588. Badge granted on 9 February 1925.
The Worshipful Company of Fishmongers
Shield: Azure, three dolphins naiant embowed in pale argent, finned, toothed, and crowned Or, between two pairs of stockfish in saltire argent, over the mouth of each fish a crown Or; on a chief gules three pairs of keys of Saint Peter in saltire Or.
Crest: On a wreath argent and sable, Two cubit arms, the dexter vested Or cuffed azure, the sinister azure cuffed Or, the hands argent holding an Imperial Crown proper. Mantled on the dexter side gules, doubled Or, on the sinister side azure, doubled argent.
Supporters: On the dexter side a merman, armed, holding in his right hand a falchion and with his left sustaining the helm and timbre; and on the sinister side a mermaid holding in her left hand a mirror and supporting the Arms with her right hand, all proper.
Motto: Al worship be to God only.
Arms granted on 19 October 1512; supporters granted 17 December 1575.
The Worshipful Company of Coopers
Shield: Gyronny of eight gules and sable, on a chevron between three annulets Or a royne between two broad axes azure; a chief vert, thereon three lilies argent.
Crest: On a wreath Or and azure, a demi heathcock, the body azure semee of annulets gold, the wings argent semee of annulets sable, holding in the beak a lily silver slipped and leaved vert. Mantled azure, doubled argent.
Supporters: On either side a camel gules semee of annulets, bridled Or.
Motto: Love as brethren.
Arms granted on 27 September 1509. Supporters granted 1574. The whole re-exemplified 20 February 1909.
Archbishop of Canterbury
Shield: Azure, an episcopal staff in pale Or surmounted by a pall proper edged and fringed of the second charged with four crosses pattée fitchée sable, ensigned with a mitre
The window does not show Geoffrey Fisher’s personal arms, which were:
Shield: Argent, a fess wavy between three fleur-de-lys Sable.
Crest: A King’s Fisher Proper holding in the dexter claw a fleur-de-lys Sable.
Bishop of London
Shield: Gules, two swords in saltire points uppermost argent hilts and pommels Or, ensigned with a mitre
(John) William Charles Wand KCVO PC
Shield: Azure a griffin segreant [i.e. with raised wings] Or on a chief of the second two mullets gules
In ecclesiastical heraldry, a bishop’s familial arms are impaled with those of his diocese, with the dexter position of greater honour being occupied by the arms of the see, and the incumbent’s arms in sinister.
Fraternity of Our Lady de Salve Regina
The badge of the Fraternity is based on the description in Revelation chapter 12 verse 1: “a woman clothed with the sun, with the moon under her feet, and on her head a crown of twelve stars” with the entwined letters ‘SR’ in the centre of the star.
