Travel chaos at UK airports is squarely down to Brexit "shambles", Ryanair boss Michael O'Leary says. The CEO of the Irish no-frills carrier also dismisses strike threats by "Mickey Mouse" unions in Belgium and Spain representing some Ryanair workers. And he says his company has dropped a controversial pre-boarding test for South African passport holders requiring them to answer questions in Afrikaans -- a language commonly spoken by only around 12 percent of South Africans, mostly amongst the white population. IMAGES AND SOUNDBITES