** Shares of Spirent Communications SPT.L rise 10.7% to
198.3p in early trading; among top pct gainers on the FTSE
mid-cap index .FTMC
** British telecommunications co agrees to Keysight
Technologies' KEYS.N offer valuing the firm at 1.16 mln pounds
($1.46 bln)
** Co ditches Viavi Solutions' VIAV.O bid that was 15%
lower
** Keysight's offer represents a premium of 85.9% to
Spirent's closing price of 108.4 pence on March 4
** Spirent shares hit highest level in more than a year
** Shares up 63.4% YTD, as of last close
($1 = 0.7931 pounds)
(Reporting by Anchal Rana in Bengaluru)
((Anchal.Rana@thomsonreuters.com; +91 9915609050;))