SIR – Letters regularly appear from Lib Dem supporters trying to justify their party’s support for the Coalition.

They mention a promise of increased tax allowances and the largely ineffective pupil premium, but otherwise produce little evidence of securing changes for the better.

As a party of Government, they have made a difference mainly for the worse by supporting Andrew Lansley’s unnecessary reorganisation of the NHS, Michael Gove’s divisive reform of GCSE examinations or, most seriously, the imposition of Iain Duncan Smith’s computer-based universal credit.

Even experienced users know the frustration of communicating through the internet where even the slightest typing error can turn your input to ‘garbage’. If you are buying from, say, Amazon it is merely inconvenient, but when your only source of income depends on your claim being registered and processed promptly, the consequences could be dire.

With eight million people having no access to computers and with increasingly expensive access charges, those most in need will struggle to get their entitlement.

If Nick Clegg and his friends really were on the side of ordinary men and women, they would have killed this idea at birth.

Brian Holmans, Langley Road, Bingley