Labour's ongoing implosion as a political party is reflected through the local election results, according to Tim Farron.
The Liberal Democrat leader said his was the only major political party other than the Conservatives with anything to "smile about" from Thursday's results - evidence it is becoming the "main opposition party".
Mr Farron predicted that the Lib Dems might be able to double their number of MPs at the June 8 General Election based on its latest performance.
""Let's not pretend that the story isn't about the implosion of the Labour Party," he said.
"They're ceasing to be the main opposition party in this country and all the indications are that on June 8 we're heading for a Conservative landslide."
Mr Farron added: "The Liberal Democrats are now your best route to prevent our country and our communities being taken for granted by a Conservative landslide."
Conservative Ben Houchen has won the Tees Valley Mayoral election.
He received 51.1% of the vote to Labour candidate Sue Jeffrey's 48.9%.
Local elections results have given the Conservatives a "wonderful platform" ahead of the General Election, ITV News' election analyst says.Read the full story ›
Ukip's local government spokesperson has told ITV News that the party "doesn't see" their results in the local elections as "terrible".
Ukip lost 10 seats in Lincolnshire, where leader Paul Nuttall has decided to run in the General Election, and faces being wiped out at the ballot box after so far failing to hold onto a single seat in Thursday's poll.
However Mr Reeve insisted the losses were "something that we'd planned for" as he argued that Ukip were continuing to be "incredibly successful" in "leading the national agenda".
He said Ukip isn't a party that's here for "personal power and political goals", adding: "Ukip is here to change the country"
"We don't see these results as terrible, we are leading the national agenda," said Mr Reeve.
"This isn't a mystery to us. It's not something that we weren't expecting and it's something that we'd planned for.
"It's incredible to hear the national media and the establishment make out that this is some sort of big surprise."
Ukip Deputy Chair Suzanne Evans has insisted Ukip isn't finished despite losing a string of council seats in Thursday's local elections.
The party has so far failed to win a single seat - a loss of 30 - and suffered a wipeout in its former stronghold Lincolnshire, where Conservatives took overall control.
When asked if Ukip were finished, Ms Evans told ITV News: "No. I think even if we don't win a single council seat in this election, and of course not all the votes have been counted yet, we'll still have 300 councillors across the country and eight Assembly Members is Wales and in London.
"So no we're not finished. I think we expected this. We have achieved our reason for being, we are headed out of the European Union.
"People have seen us as a single issue party, that's not true, but that's how people have seen us. So I think there is a sense out there that our job is done but it absolutely isn't."
Vince Cable said the Liberal Democrats enjoyed a "positive outcome" in the local elections as his party seeks to recover from being "quite badly damaged" in the coalition years.
The Liberal Democrats enjoyed a boost in Hampshire, where ex-MP Mike Thornton in Eastleigh secured one of three gains from Ukip, but failed to breakthrough against the Tories in the south-west England battleground.
Speaking to ITV News, Mr Cable described the Conservatives and Ukip as "effectively the same" and insisted that if voters want an alternative "we are it".
"We are holding our ground, we have increased our vote share in parts of the country where we hope to win back parliamentary seats... so I think we've got a positive outcome," the former Business Secretary said.
"We are aware that we will be competing against the Conservatives and Ukip who are effectively the same now, I mean they've got the same values and support base. But I think people will be looking for an alternative to that."
Shadow Chancellor John McDonnell has admitted that Labour suffered a "tough" night as it struggled in some of its Welsh heartlands and failed to resist Tory advances in England.
But he said the results were not "the wipeout that people expected" and insisted it is still "all to play for" in the General Election in just five weeks' time.
Speaking on ITV's Good Morning Britain, he said: "We've held on and actually I think we've done very, very well in comparison with what we were predicted to do in terms of doom and gloom for Wales and we'll see elsewhere in the country where I think Labour's vote is holding up."
Sir Michael Fallon said early results from the local elections were "encouraging" as he insisted the Conservative Party was "not being complacent".
The Defence Secretary told ITV's Good Morning Britain that gains in the local elections "doesn't forecast what is going to happen (in the General Election) on 8th June".
"We've got to work for every single vote, we've got to get out there and explain why we need this larger working majority for Theresa May in her (Brexit) negotiations," he said.
"The reason we're not crowing is because there's nothing yet really to crow about. Only a quarter of the votes have been counted and the turnout is only half what you get in a General Election. So it is far too early to predict even from last night what is going to happen by the end of today."
Party bosses celebrate as candidates take unexpected victories in traditional Labour territory of Tyne Tees and West Midlands.Read the full story ›