The Liberal Democrats are trailing in sixth place in Wales behind Ukip, Plaid Cymru and the Greens as well as Labour and the Tories, according to a poll that examines voting intentions at the UK general election.

Labour came out on top of the poll with 37%, ahead of the Conservatives (23%) and Ukip (16%). The Lib Dems polled at 6%, two points behind the Greens.

Roger Scully, professor of political science in the Wales Governance Centre at Cardiff University, suggested the figures could translate to the Lib Dems losing two of its three seats at the general election.

The YouGov/ITV/Cardiff University poll also asked people how they would vote in next year’s Welsh assembly elections. The results suggested that all six parties could win seats at the assembly. Ukip would win eight seats, the Greens three and Lib Dems two, Scully said.

Kirsty Williams, the Lib Dem leader in Wales, who was on the general election campaign trail in Cardiff on Tuesday, said: “People have a decision to make in May: do they want to go back to the old way of doing things, when Labour crashed the economy whilst the Tories only looked after their own, or do they want a party in government that can be economically competent but that also will fight for a fairer Wales?

“In government we have delivered an £800 tax cut for more than a million people in Wales. We’ve provided the biggest ever cash rise in the state pension and have given parents up to £2,000 in tax-free child care. That is the proud record we will be taking to doorsteps around the country over the next 100 days.”