This pub is not only a grade II* listed building, it is also a One Star pub on the Campaign for Real Ale’s (CAMRA) National Inventory with an interior of special national historic interest, and the description is as follows: "The star feature here is the magnificent tiled panel from 1889 depicting Sir Christopher Wren, and the tiled walls of the cellar bar.

The Lamb is at the heart of the echoing splendour of Leadenhall Market, rebuilt in 1880-1 to the designs of Horace Jones, architect and surveyor to the City of London. Once bustling with market traders, porters and their customers, the market is now more an eclectic mix of shops and restaurants, but the Lamb Tavern is still a vibrant place to visit. Apart from the architecture, there are several historic features. The external glazing has lots of etched glass including a large corner panel with the words ‘W Pardy Wine and Spirit Merchant’ and door glass naming the former rooms within.

Just inside the right-hand doors is a large tiled panel from the prolific firm of W B Simpson & Son, helpfully dated March 1889. As the inscription says, it shows Sir Christopher Wren in 1671 explaining (for some reason best known to him) his plans for the Monument to those gathered around, including a puzzled lady in a carriage attended by her black servant boy. The cellar bar (Old Tom's Bar) is a warren of spaces under depressed, red-brick jack-arches and is notable for its cream and green tiling. The rest of the fittings and arrangements are modern, including the mezzanine floor."

The listing description (for Leadenhall Market) is as follows: "Including Nos 89 and 90 Gracechurch Street. 1881, by Sir Horace Jones. Complex of roofed footways with 3 detached portions to south, lined with open fronted shops. External architecture of red brick and Portland stone in thin, classical style. Interior more robust with order of giant Corinthian columns etc apparently all in cast iron with elaboration to octagonal crossing. Simple, arched roof of timber and glass. Main elevation to Gracechurch Street with pair of ornamented 4 storeyed pavilions topped by shaped gables and turrets. Wide entrance with windows over and wide, shaped gable. Other entrances with City arms carved in Portland stone pediment supported on cast iron structure. Modern canopy of glass and iron to shops standing in open."

The WhatPub link is here: WhatPub/Lamb Tavern

The Pub Heritage Group link is here: PHG/Lamb Tavern

The Lamb Tavern featured on the Evening Crawl of EC2, EC3 and EC4 on 10 December 2003, and the Evening Crawl of the City of London and Borough on 20 August 2004.