Various
The ultimate manhole covers site

There are 2 covers that are used by North Thames Gas Board:      Show on map Thumbnails mode

1 London - NTGB - small cover
70 A502, Camden Town, London NW1 8AP, UK
2 London - NTGB - Gas - small cover
86 Portobello Rd, Notting Hill, London W11 2QD, UK

The ultimate manhole covers site

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