Bulgarian and Romanian immigration - what are the figures?

The number of Romanians and Bulgarians working in the UK has fallen since restrictions were lifted, according to official statistics. So what's going on?

What has happened?

How many more Romanians and Bulgarians have come since 1 January?

Does this mean fears of a "flood" of immigrants were misplaced?

What does the government say?

And the other parties?

When will we have a better idea of Romanian and Bulgarian immigration trends?