Lib Dem MEP Lucy Nethsingha – until her election the county council group leader for her party – is one of the signatories to a cross party pro Europe declaration signed in Brussels.
The MEP tweeted this week that "we must stop Brexit to ensure a greener, better future for the UK citizens".
She will be one of the guest speakers in Ely on Saturday at a pro Europe rally that is attracting widespread support.
Ms Nethsingha is also one of those to have joined with a cross party group of UK members of the European Parliament to sign a declaration committing themselves to work together in the face of Brexit; they have called upon continental colleagues to support their efforts.
Meeting in Brussels, representatives of the Green, Labour, Liberal Democrat, Alliance, Plaid Cymru and Scottish National Party were able to sign "the Brussels Declaration" which states:
We, the undersigned UK Members of the European Parliament, representing England, Scotland, Wales and Northern Ireland, declare as follows:
The proroguing, or shutting down the UK Parliament in order to limit scrutiny of the implications of a potential no deal Brexit is completely unacceptable. Limiting the opportunity for MPs to debate, vote and crucially, to legislate, cannot be the response to a referendum in which Leave campaigned for the UK Parliament to "take back control".
In the continuation of the spirit that UK MEPs have worked in since the 2016 Referendum we commit ourselves to continue to work across party lines and declare that it is vital that MPs do likewise.
We were all elected just four months ago with clear mandates. We are working together. We call upon our European friends and colleagues to assist domestic efforts in keeping the door open to us.
The Declaration was signed by:
Green Party
Molly Scott Cato MEP
Alexandra Phillips MEP
Magid Magid MEP
Scott Ainslie MEP
Ellie Chowns MEP
Gina Dowding MEP
Catherine Rowett MEP
Labour Party
Richard Corbett MEP
Seb Dance MEP
Jude Kirton-Darling MEP
Neena Gill MEP
John Howarth MEP
Theresa Griffin MEP
Jackie Jones MEP
Julie Ward MEP
Rory Palmer MEP
Claude Moraes MEP
Liberal Democrat Party
Catherine Bearder MEP
Caroline Voaden MEP
Chris Davies MEP
Phil Bennion MEP
Jane Brophy MEP
Judith Bunting MEP
Dinesh Dhamija MEP
Barbara Ann Gibson MEP
Anthony Hook MEP
Martin Horwood MEP
Shaffaq Mohammed MEP
Lucy Nethsingha MEP
Bill Newton Dunn MEP
Sheila Ritchie MEP
Irina Von Wiese MEP
Alliance Party
Naomi Long MEP
Plaid Cymru
Jill Evans MEP
Scottish National Party
Alyn Smith MEP
Aileen Mcleod MEP
Christian Allard MEP
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