Ex-divs to take 0.97 points off FTSE 100 on May 29

LONDON, May 27 (Reuters) - The following FTSE 100 companies will goex-dividend on Wednesday, after which investors will no longer qualify for thelatest dividend payout. According to Reuters calculations at current market prices, the effect ofthe resulting adjustment to prices by market-makers would take 0.97 points offthe index. COMPANY (RIC) DIVIDEND INDEX IMPACT (pence) (points) Marks & Spencer 10.8 0.68 AMEC 24.8 0.29 Among FTSE 250 companies going ex-dividend are: COMPANY (RIC) DIVIDEND Britvic 5.40 Cable & Wireless Comm 2.67 Great Portland Estates 5.06 Marston's 2.30 NMC Health 4.10 Premier Farnell 6.00 Scottish Mortgage Inv 7.30 Spectris 25.50