Londinium Welsh or Old English names, as their original Roman names have been entirely lost due to the lack of written and inscribed sources. (It was customary elsewhere to name roads after the emperor during whose principate they were completed, but the number and vicinity of routes completed during the time of Claudius would seem to have made this impractical in Britain's case.) The road from the Kentish ports of Rutupiae (Richborough), Dubris (Dover), and Lemanis (Lympne) via Durovernum (Canterbury) seems to have first crossed the Thames at a natural ford near Westminster before being diverted north to the new bridge
English Place-Name Society on names organised by region or by category (e.g. field-names), and some county dictionaries aimed mainly at a non-specialist audience. Most English counties are now covered by volumes in the place-name survey, although early volumes are not as detailed as the later ones. The Survey volumes for the North and East Ridings of Yorkshire and parts of the West Riding of Yorkshire are available free of charge on the English Place-Name Society website. From the 1960s there has been a change in the interpretation of some place-names, resulting from the detailed comparison of distributions of the place-name types which had