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** Carillion falls 5 pct after being up as much as3.5 pct, after announcing FY guidance
** Sees a slowdown in new orders in H2 due to Brexit vote
** Liberum says trading statement broadly in-line butflattered by a £20m one-off in support services division
** Berenberg, Singer and Liberum all point to reduced ordervisibility (70 pct for 2017 v 84 pct for 2015)
** Stock the most shorted on the FTSE 350 - 16 hedge fundshave major short positions totalling 21.6 pct, according to theFCA disclosure register
** A number of brokers expected a short squeeze given lackof major negatives, with some calling the stock up as much as 5pct pre-market
