Tate & Lyle has issued a third profit warning in a year, blaming volatile commodity prices and supply chain problems.
"They're not looking to make a second profit".
Petrofac lost 36p to £12.88 after a second profit warning in less than six months from oil services peer Saipem.
The retailer has issued a second profit warning in three months, after savage discounting and reluctant shoppers depressed Christmas sales.
It issued a second profit upgrade in the space of six weeks, just six days after bigger rival Sports Direct warned on profits.
The so-called Baby Bells may now hike prices.UneasyJetEasyJet issued a second profits warning within a month, signalling turbulent times for Europe's budget airlines.
However, Morrisons shares posted the worst performance in the FTSE 100 as a second profit warning in three months triggered a 12% slump.
The company may have revealed a first profit early this month, but there are likely to still be some who see the soaring share price as a selling opportunity.
William Hill shares fell 11% to 329p and were the biggest fallers in the FTSE 350 group of leading shares after a second profit warning in five months.
Meanwhile a second profits warning within three months suggests Capita's ability to read its own markets is not what it once was.
In February 2014, United announced a fourth profit in five years, £319,000, in their latest annual accounts.
