Nigel Farage said he failed to attend a campaigning event in Croydon today because he was "too busy", denying reports that his no-show was due to safety concerns.
"Our Croydon branch had a little street party and they were desperate for me to go, but I've been a bit busy," said the Ukip leader.
More top news
Anne Marie Morris lost the whip in July after audio footage emerged of her using the racist phrase "the real n***** in the woodpile".
Investigations into two MPs on both sides of the House are set to conclude - and both are proving tricky for their party leaders.
A trade union representative said the strike would either disrupt flights or generate substantial costs for the airline.