In terms of the modern setting of the United Kingdom of today, I think that one of the significant push factors is going to be the challenging economic condition regarding employment in England. Given the current economic state of affairs in England, I sense that the inability to find work could be seen as a push factor. Some recent statistics about Britain's unemployment rate speaks to this:
The number of people working part-time because they could not find a full-time job increased by 110,000 to its highest level since records began in 1992. 'The new jobs being created are mainly part-time. These jobs are not paying enough to replace the full-time earnings that people need,' said TUC general Secretary Brendan Barber.
The fact that the jobs through which people could settle down and significantly begin living their lives in an economically prosperous manner are not being created at sustainable pace reflects how this could be a push factor. Adding to this is that the cost of living in England is rather challenging to meet without gainful employment, contributing to yet another push factor in terms of immigration out of England.