Plagued by accounting worries and persistent fundraising gossip, electronic equipment group Invensys lost 5 3/4p to 87p. Sentiment was not helped by Robotic Technology's (31 1/2p down at 65p) profits-warning. RT is involved in similar markets in the US. Patent paranoia left drugs giant AstraZeneca 100p down at a low of 2670p. The peak in March was 3625p. A New York court is expected to decide soon whether Prilosec, its £4bn-a-year ulcer drug, should lose patent protection.