Border workers' trade union chief Lucy Moreton admitted illegals are 'very very' unlikely to be caught and kicked out

It is impossible to track down the hundreds of thousands of illegal immigrants working on the black market in the UK, a border workers' union boss has warned.

Swingeing cuts to the immigration enforcement workforce has left the country vulnerable, it is claimed.

And there will be no way of enforcing new rules on EU nationals once the Government's post-Brexit immigration strategy is eventually finalised.

That is the warning from Lucy Moreton, of the Border Force workers' trade union the ISU.

She told the Sun: 'If you are here illegally you can survive very well, you access medical services your child can go to school the chances of us catching you are very, very slim.

'If you don't break the law we are not going to get you as we don't have the resources. We can't catch you.'

Just days ago pictures emerged of Albanians hiding in lorries and posing for 'stowaway selfies' on their way to Britain.

The latest immigration warning comes just days after pictures of young people hidden in lorries were uploaded on Facebook pages including 'Albanians in London', alongside the caption: 'On the way'

Families in Albania openly admitted sending their children to sneak into Britain to find a better life. Many end up in foster care or at the mercy of criminals, a Daily Mail investigation reveals

Ms Moreton's warning comes as an ex-director general of immigration enforcement, David Wood, told MPs there could be more than a million illegal immigrants in Britain.

He claimed many were living under the radar and it was unlikely they would ever be deported.

And ahead of a grilling by MPs on Wednesday, Ms Moreton said the Government had effectively outsourced immigration enforcement to private companies.

The UK's immigration problem was highlighted again earlier this week Images on three Facebook sites purportedly show young Albanians celebrating their illegal entry into Britain

A top border official has said swingeing cuts to the immigration enforcement workforce has left the country vulnerable

Already this year dozens of landlords have been slapped with heavy fines for failing to check whether their tenants had the right to be in the UK.

The immigration enforcement workforce is entirely separate from Border Force, the team that patrols the country's customs at airports and ferry terminals.

Ahead of Brexit, an additional 300 Border Force staff are said to be in the process of being hired but critics say an extra 3,000 will be needed to cope with post-Brexit conditions.

And Ms Moreton warned a Hard Brexit could spell trouble for immigration and could see massive waiting times at the border.

A Home Office spokesperson said immigration should be judged on results and not staff numbers.