But there were steadier waters for cruise ship group Carnival, which sailed up 37p to 2128p, topping the FTSE 100 leaderboard.
A proposed total dividend of 5.5p and a profits rise at specialist chemicals maker Yule Catto & Co helped shares move up 9.3p to 151.1p.
On Aim, Fox Marble — the first company out of Kosovo to list on AIM — will use the £9.65 million raised from the listing at 20p a share to fund a processing plant to cut and polish marble.
A dry oil well in Puntland, Somalia, has wreaked havoc for explorer Red Emperor Resources’ share price. The explorer, which had suspended its shares awaiting the news from the well, spiralled 91.1% to 4.6p, a 3.4p slide.
Partner Range Resources, in a joint venture with Horn Petroleum Corp at the project, edged up 0.24p to 5.1p.