Ex-dividend date28 Aug 2024 16:50
See this RNS from last quarter 22nd May, about half way down (quote copied below):
https://www.lse.co.uk/rns/PTAL/renewal-of-share-buybacks-and-corporate-updates-7dnpg95u1idi6zl.html
"Ex Dividend Date for Q2 2024 Dividend
Based on new shortened security settlement rules in effect on May 27, 2024, which apply to Canadian securities industries, PetroTal is issuing an adjusted dividend timetable for its upcoming Q2 2024 dividend:
Ex dividend date: May 31, 2024 (previously May 30, 2024)
Record date: May 31, 2024 (unchanged)
Payment date: June 14, 2024 (unchanged)"
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Canada, the USA and Mexico went to T+1 settlement from 28th May this year, so their XD and Record dates are now the same. What's not 100% clear is how that translates to the UK and PTAL haven't clarified it, but from what I can gather the same XD date now applies here as well.
Financial data providers such as HL and other brokers, DividendData, media services, etc. all still assume that the usual UK rule applies of XD being the day before record date, but you can't rely on that.