Former UKIP leader Nigel Farage says he has not decided yet whether to stand in the General Election on 8 June.
The MEP says he has to weigh up “where am I best to be in terms of having an impact on Brexit” – in Westminster, or the European Parliament.
He also said current leader Paul Nuttall had “six weeks to prove himself” in the party’s top job.
The only MP to be elected under a UKIP banner was Douglas Carswell in Clacton – but he has since quit the party.
Ex-UKIP donor Arron Banks has said he intends to stand in Clacton this time, although Mr Carswell has now confirmed he will stand down.
Mr Farage, who stepped down from the UKIP leadership following the UK’s decision to leave the EU, told BBC Radio 4’s Today: “I am still leading a group in the European Parliament, where of course ultimately there will be a veto over the whole Brexit deal and where the negotiations will take place over the next two years.
“And I’ve got to weigh up, where am I best to be in terms of having an impact on Brexit and perhaps warning the British public that it’s not going in the direction it should be.”
Mr Farage, who is chairman of the Europe of Freedom and Direct Democracy Group in the European Parliament, has failed in seven attempts to get elected to Westminster.
On Mr Nuttall, who finished behind Labour in the Stoke Central by-election in February, he added: “He’s got six weeks to prove himself, hasn’t he? It’s just as simple as that.”