Theresa May has come under renewed pressure to guarantee the rights of EU citizens based in the UK after figures revealed nearly 200 work at the Westminster Parliament.
Data obtained by the Liberal Democrats shows 195 European nationals are estate passholders.
Some 137 – including Irish citizens – are employed in the House of Commons and 58 in the House of Lords.
Former Scottish secretary Alistair Carmichael said the numbers showed the position of EU nationals living in the UK was “perhaps closer to home” than many MPs realised.
The northern isles MP added: “There are very few work places or communities anywhere in the country that are not being affected adversely by the continuing uncertainty about the future of these people.
“Theresa May could act now to end that uncertainty but chooses not to. If she did it would be to the benefit of not just the three million or so people directly affected but also the communities and businesses here and British nationals living elsewhere in Europe.”
Party leader Tim Farron added: “MPs who voted for Brexit seem happy to have doors opened for them and be waited on in restaurants in the Palace of Westminster by EU staff.
“Yet they are effectively saying ‘you might have worked here all your adult life, but at any given moment we might send you packing if we are unable to use you as bargaining chips.’ That is disgraceful.
“The government should guarantee the right to remain of all EU citizens.”
Overall, some 5.7% of parliamentary staff face an uncertain future due to Brexit.
They are among an estimated three million EU nationals – one in 20 of the British population – believed to be living in the UK.
A UK Government spokesman said EU nationals made a “vital contribution”, adding: “That’s why we want to reach an early agreement on the rights of UK nationals in the EU and EU nationals in the UK.
“We welcome the fact that our European partners are also prioritising this and will be seeking the earliest possible agreement on this issue.”
Mrs May has so far refused to unilaterally guarantee EU nationals’ rights, insisting she has a duty to protect British expats too.
But she has repeatedly stressed she wants to make the issue a priority in Brexit talks.
And ministers claim several countries have indicated privately they want the issue resolved swiftly.
