............mortgage costs, say experts

Homeowners hoping they can sue Barclays for distorting their mortgage rates through its Libor manipulation have been warned they would struggle to prove they lost out - but this may not prevent a wave of hopeful claims.
Barclays’ £290million fine for fiddling the benchmark interest rate, has led to borrowers to question whether they could claim compensation from the bank en masse, similar to the successful claims made in the multi-billion pound Payment Protection Insurance mis-selling scandal.
Shares in Barclays today plummeted by as much as 17 per cent as the full ramifications of the scandal sparked deep concern among investors. Opposition leader Ed Miliband called for a criminal investigation and shares in Lloyds, HSBC and Royal Bank of Scotland also fell as they admitted they were being investigated over alleged involvement in the affair.