The Bulgarian ambassador has told ITV News there should be no panic about an influx of Bulgarians as many of them who want to work in the UK have already arrived in the country.
Figures released by the Office for National Statistics suggest the number of Romanians and Bulgarians working in the UK has risen by more than a quarter in three months.
Ambassador Konstantin Dimitrov said, "I think it is unnecessary for the simple reason that most of those who want to come here have already done so".
ITV News correspondent Juliet Bremner reports:
More top news
Thirty facts about Prince Harry to celebrate his coming of age.
Django Unchained actress Danièle Watts was handcuffed by police after she was seen "showing affection" to her partner, NBC News reported.
A US news anchor has told viewers he only has four to six months to live on air, after he was informed that his brain tumour was inoperable.