‘Savvy travel bookers who click on low price adverts may find they are often lead to air, rail and bus websites which do not have any seats at the advertised reduced fares. The advertising watchdog has found that in at least one case this is because there were never many low fare seats available at all, and has banned Megabus from advertising its seats as “from £1” after it was found only three per cent of seats were available at that price.’
Daily Telegraph, 28th March 2018
Source: www.telegraph.co.uk