Ukip will only avoid a slump in the polls after the European Parliament elections next year if it can convince voters it will win seats in Westminster, the party's leader has admitted.

Nigel Farage told the BBC Radio 5 Live Pienaar's Politics programme there were votes for the party to win in both the Conservative and Labour parties - but said he could not predict his party's fortunes.

Mr Farage said: "There is a big fragmentation, a change in British politics. At every General Election the share of the vote Labour and the Tories get declines and I do not see that trend reversing.

"The key to whether Ukip fades away or not will be if it is perceived there are parts of the country we can actually win seats and that's the key."