BUZZ-Inmarsat: boosted by Barclays upgrade
** Inmarsat (LSE: ISAT.L - news) +2.2% after Barclays (LSE: BARC.L - news) upgrades to "equal-weight" v "underweight"
** Cites better than expected Q3 last week notably as GX starts to deliver, and stock's correction
** Stock down by about a third this yr amid fierce competition in Aviation, the key to co's success
** Barclays, however, also flags high execution risk, rising competition (HTS), and a valuation that still factors in sustained growth acceleration (RM (LSE: RM.L - news) : tricia.wright1.thomsonreuters.com@reuters.net)