I’m not finding any credible sources or official confirmation that Ant McPartlin and his wife have left the UK for six months to launch a £500,000 project in Sri Lanka. There are no recent reports from reputable outlets reporting such an announcement.
• Searches turned up nothing related to Ant or his wife (Anne‑Marie Corbett) departing the UK or discussing a major investment in Sri Lanka.
• Current known facts: Ant remains based in the UK, caring for his young son, Wilder, while continuing his philanthropic efforts and television work.
Until reliable coverage appears—say, from mainstream British or Sri Lankan media, or an official statement from Ant himself—this appears to be rumour, not reality. If you're coming across this story elsewhere, it's likely misreported or based on speculation.