@thomasthetaxi She is wrong! It is only a defence if a,b and c are met once the 3rd party is warned c cannot apply.
At the moment this legislation only applies to London. Prohibition of certain advertisements. The following provisions apply to any advertisement: (1) indicating that vehicles can be hired on application to a specified address in London; (2) indicating that vehicles can be hired by telephone on a telephone number being the number of premises in London; or (3) on or near any premises in London, indicating that vehicles can be hired at those premises. No such advertisement may include any of the following words, namely 'taxi', 'taxis', 'cab' or 'cabs' or any word so closely resembling any of those words as to be likely to be mistaken for it (whether alone or as part of another word), unless the vehicles offered for hire are London cabs. An advertisement which includes the word 'minicab', 'mini-cab' or 'mini cab' (whether in the singular or plural) does not by reason only of ...