BUZZ-Inmarsat: boosted by RBC upgrade
** Satellite company's shares +2.2 pct, among top performers on FTSE 250
** RBC upgrades to "outperform" from "sector perform"; lifts TP to 1000p from 760p
** Broker cites operational trends and M&A potential, says ISAT is too small to remain independent and sees a number of potential large-cap counter bids if it does become a target
** Up to Monday's close, the share has risen 9.2 pct YTD