Some observations on the Migration Watch papers, in bold.

Economic migration.
The present government have trebled the number of work permits issued from 43,000 in 1997 to 129,000 in 2007. Dependants are additional.
Family reunion.

In the same period, UK unemployment levels fell year on year, proving that those work permits were necessary and desirable to our economy and society. As we established earlier in this thread, large numbers of migrant workers have returned home at the end of their permits or as a result of the recession

The government changed the rules in June 1997 to permit marriage to be used as a means of immigration. The numbers have since risen by 50% to about 42,000 a year.

This statement is not entirely correct and taken out of context, as it is, it is a little disingenuous and does not represent a useful discussion. In 1997, the goverment removed the "primary purpose" rule, which said that parties to a marriage had to prove that the primary purpose of the marriage was not to gain entry to the UK. This led to some contentious and allegedly inhumane situations.

Even having taken out the primary purpose rule, it remained for applicants to prove that they could provide adequate accommodation for themselves and any dependants without recourse to public funds and that they could financially support themselves and dependants without recourse to public funds.

Since 2004, new rules have been brought in to deal with sham or forced marriages.

Some more complete details are HERE on the migration watch website. Keith, if you find a website you like then please quote it more fully so as to ensure that your fact snippets don't cause people to be mislead

Asylum.
The government have sought to tighten the system and have made a number of improvements. However, they are still not removing as many as are rejected each year so the pool of illegal immigrants continues to grow. Applications are currently running at about 30,000 a year.
Illegal immigration
13. There are three main sources of illegal immigration - those who enter illegally on the back of a truck, visitors and students who overstay their visas, and rejected asylum seekers who the authorities fail to remove.

14. In June 2005, a government commissioned study gave a central estimate of 430,000. Migrationwatch updated this to 475,000 (Briefing Paper 11.6). In March 2009 a study by the London School of Economics suggested a central estimate of 725,000 of which 518,000 were thought to be in London. The government continue to be opposed to an amnesty - for good reasons (Briefing Paper 11.7).

I don't think anyone would deny that the government failures to remove failed asylum seekers or other known 'illegals' is a bad thing for everyone - notably for the illegals themselves who remain either in detention centres or on the worst margins of our society.

But I ask, what is your point? If everybody agrees about this, and believes we need to get our act together on removals.