British finance minister George Osborne has warned the government will clamp down on welfare claimants, shortly before he was expected to outline more spending cuts during his party conference speech.

In an article for Monday’s Daily Mail, Chancellor Osborne and Work and Pensions Secretary Iain Duncan Smith stressed it was “no longer OK to opt out of a life of work”.

The pair hinted that jobless parents and unemployed youths could be about to see their entitlements reviewed.

“Is it right that school leavers should be able to move directly from school to a life on housing benefit without finding a job first?” they asked.

“Is it right that people in work have to consider the full financial costs of having another child while those who are out of work don’t?”

Osborne was due to make his speech to the conference in Birmingham later on Monday and was expected to announce plans for another STG10 billion ($A15.99 billion) of cuts to the welfare system, according to reports.

The reductions are in addition to the STG18 billion ($A28.78 billion) in welfare cuts that are already planned by 2015.

The Liberal Democrats, the coalition government’s junior partners, are opposed to further welfare cuts unless new wealth taxes are also introduced.