David Cameron 'delighted' with Valleys lines rail deal

A deal to electrify railway lines in the south Wales valleys will have a "huge" impact, the prime minister says.

The UK government will fund the upgrade of the Swansea-London mainline by 2018, and will pay almost half an estimated £500m to electrify the Valley lines.

The Welsh government expects to meet its share from cost savings and increased revenue.

The agreement settles a bitter dispute between Westminster and Cardiff Bay over who should foot the bill.

David Cameron told BBC Wales political editor Nick Servini the UK government was "bending over backwards" to ensure electrification went ahead.