Paul Heaney with voters in a cafe in Merthyr Tydfil
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Election 2015: What's on the menu in Merthyr?

Immigration is shaping up to be one of the hot election topics in Merthyr Tydfil and Rhymney.

Labour's majority in a traditional industrial valleys seat was cut by a strong Lib Dem challenge in 2010 but UKIP are among the rival parties also hoping to make inroads this time around.

Paul Heaney reports.