Temporary power provider Aggreko was a casualty of the latest quarterly FTSE 100 review, demoted to the 250 index as satellite company Inmarsat enjoyed a promotion.Aggreko has a market capitalisation of around £3.95bn, whereas Inmarsat has a market value of around £4.53bn.Banknote printer De La Rue was among the eight stocks leaving the FTSE 250, along with Imagination Technologies, Infinis Energy and oil and gas exploration company Soco International.De La Rue came under pressure in May after the company, which makes banknotes for the Bank of England, posted a slump in annual profit and slashed its dividend as a result of euro weakness.Meanwhile, Wizz Air Holdings, Woodford Patient Capital and John Laing Group were among the eight stocks entering the FTSE 250.