** British broadcaster ITV's ITV.L shares down 6% at 77p

** Stock among the top losers across all London stocks

** ITV agreed to sell its media and entertainment unit to Comcast's CMCSA.O Sky for £1.6 billion ($2.14 billion) on Monday

** J.P.Morgan downgrades stock to "neutral" from "overweight", cuts PT to 85p from 104p, citing lower disposal price, separation costs and stranded Studios costs

** Brokerage says the sale of the M&E division to Sky failed to capture any synergy upside for ITV

** "ITV has not been able to secure the deal that we had hoped for - not helped by the ongoing UK and global political/macro uncertainty over the past 6 months (and indeed the last 10 years since Brexit)" - JPM

** ITV down ~6% YTD

($1 = 0.7468 pounds)