A PCS Union spokesman said:
The issues of the last few days has brought to the public's attention what we have said for a long time, that ministers can't cut staff and expect to run the same service - not just on passport controls at Heathrow, but right across UKBA.
Clearly, the cuts already made have had a major impact and further cuts planned every year until 2015 will make the situation even worse.
More top news
Two people are being treated in hospital after they were shot outside a tube station in east London.
Each of London's boroughs has a different policy on recycling, so maybe it's time we switched to a consistent way to go green?
Emergency services were called to Kennington Road, near the junction with Black Prince Road to a report of a man who had been stabbed.