michael foster denied launching a foul-mouthed attack at a rival candidate .
mr foster objected when a candidate mentioned his £ 1.5 million home .
the former literary agent was at a public hustings in cornwall .
loveday jenkin challenged mr forster over the value of his second home .
the above article has been amended to make clear that loveday jenkin is standing for the cornish party mebyon kernow not the cornish nationalist party .