Gasholder No 7, former Bromley-by-Bow gasworks

This gasholder was built between 1879 and 1882 to the design of engineer Vitruvius Wyatt for the Gas Light and Coke Company. The contractors were Westwood and Wrights, with construction carried out by William Bourne Wright.

The gasholder is approximately 23 metres high and 62 metres in diameter. It is constructed primarily of cast-iron columns and composite wrought and cast-iron girders for the guide frame. Each girder features a decorative cast-iron web between two wrought-iron angles at the top and bottom. The circular guide frame consists of two tiers of 24 cast-iron columns connected by horizontal cast and wrought-iron girders, classified as Type 14 in Tucker’s typology of gasholders. The lower columns are fixed to substantial moulded cast-iron pedestals, which have fielded panels and oval plaques. These plaques bear the inscriptions "WILLIAM BOURNE WRIGHT / ENGINEER", "WESTWOOD & WRIGHTS / CONTRACTORS", and the date of completion. The lower columns are cast as Roman Doric columns, complete with moulded bases and capitals. Each column is topped with a junction box resembling a Doric entablature, featuring a frieze with triglyphs beneath a cornice. This cornice is a detachable casting hiding the structural connection between the columns. The lower girders are embellished with intricate filigree ironwork. The upper tier of columns is a simplified version of the Corinthian order, surmounted by a plain frieze. The columns’ proportions progressively lighten from the heavier Doric at the base to the more delicate Corinthian at the top, following classical design principles. The upper girders are decorated with an interlocking circle motif. Guide rails are attached to the inside edge of each column, designed to accommodate the wrought-iron roller carriages that support the telescopic bell of the gasholder.

According to planning legislation, the bell and tank themselves are not considered to contribute to the building's special architectural or historic interest. However, any proposed works that could affect the overall character of the listed building may still require planning permission and are subject to the local planning authority’s assessment.