A camping gear advert with the slogan "No poles required!" appeared next to a UKIP election campaign billboard.
The advertisement for inflatable tent technology was photographed next to the party's campaign poster for the upcoming European election.
A spokesman for Clear Channel, the company responsible for the posters, said they were put up at the same time."We can understand why people would make the connection, but at the same time one is for an election campaign on European bureaucracy and the other is an advert for camping supplies."
A statement from UKIP said there was "no deliberate intent."
More top news
Around 88% of economists questioned by Ipsos Mori said leaving the EU would damage Britain's growth rates over the next five years.
Justice Secretary Michael Gove warned David Cameron that his failure to limit migration is 'corrosive' to public trust.
After a lively start to the long weekend with torrential, thundery downpours - a drier night.