These advertisements were removed last year from the London Underground

'Transport for London (TfL) have removed fake adverts from the tube that claimed the BBC was covering up Israel’s “crimes”. The advert showed what appeared to be dead bodies covered up by large letters in the logo of the BBC, with an Israeli army helmet hanging on the side of one of the letters. The poster proclaimed “we don’t cover Israel’s crimes, we cover them up.” 

'Lawyers for Israel (UKLFI) reported this obviously illegal poster to TFL, which acted swiftly.

'A spokesperson for TFL told UKLFI: “… this poster was not authorised by Transport for London or our advertising partners. As such, we have instructed our teams and contractors to remove any that are found on our network.”'

From the site of UK Lawyers for Israel (UKLFI) which reported the ads. 

Why were they obviously illegal? 

Because they were an example of fly postering or because their content was illegal for some reason?

The organisation is very keen to suppress criticism of Israel.  Has anyone in Parliament suggested the UK allowing free speech as she did before the Race Relations Act 1965? Nigel Farage did years ago but free speech is almost the most important issue there is.