Health officials fear that moving checks 20 miles inland could lead to the entry of contaminated meats and the spread of diseases like African swine fever.

Despite new border protocols since leaving the EU, the port authority, supported by a parliamentary committee, warns that there's no guarantee vehicles will comply with the new check site, posing a risk to public health.

With legal counsel engaged, the authority is considering taking legal action if the government fails to address their concerns.

While the government insists strict controls will maintain biosecurity standards, further comment has been withheld because of the potential for judicial review. The parliamentary committee shares the port's concerns, prompting further discussions with ministers.