An advertising campaign highlighting the pitfalls of life in the UK such as the rain expected to drench the country this week could be used by the Government to put off would-be immigrants from Romania and Bulgaria.

The measure is reported to be among ideas being considered by officials seeking ways to curb the expected arrivals from the two newest EU member states when temporary restrictions expire in December.

They are also looking at the potential to deport anyone who failed to find work within three months of arriving or to show they could support themselves for six months.

No official estimate has been put on the anticipated number of arrivals - with ministers wary of the situation when Poland joined the Union and much larger numbers than predicted came to the UK.

Communities Secretary Eric Pickles has admitted the influx would ''cause problems'' with services such as housing, with the highest numbers likely to pick London boroughs which already have significant populations from the countries.

However, he insisted it was not ''reasonable'' to assume that 300,000 would move to the UK - the figure suggested by some Tories based on migration levels after Poland, the Czech Republic, Latvia and Lithuania acceded.

The Government has confirmed it will not seek to extend temporary curbs on 29 million Romanian and Bulgarian nationals' right to live and work in Britain, which are due to expire in December.

Prime Minister David Cameron's official spokesman declined to comment on reports of an advertising campaign to put off would-be migrants from Romania and Bulgaria coming to the UK.

The spokesman told a regular Westminster media briefing: ''As you would expect, the Government is considering what options there may be and the process of looking into these and considering them is under way.

''The issue here is around dealing with potential damage to the UK labour market and potential scope for curbing immigration to that end.

''We are in the process of considering what we may be able to do. Clearly, there is a European legal framework within which we have to operate.''