European shares up as Ukraine rebels allow improved access
* FTSEurofirst 300 index gains 0.9 percent
* Ukraine rebels hand over black boxes from Malaysian plane
* ARM Holdings surges after strong results
* Actelion gains as results revive M&A speculation
By Atul Prakash and Francesco Canepa
LONDON, July 22 (Reuters) - European equities bounced back on Tuesday partly in response to signs of improved cooperation from Ukraine's pro-Russian rebels who have agreed to hand over the black boxes from the Malaysian plane downed in Ukraine last week.
The handover and reports by international investigators of improved access to the wreckage of the airliner four days after it was shot down, came amid calls for broader sanctions against Russia for its support for the rebellion.
The prospect of harsher sanctions on Russia, combined Israel's escalating ground offensive in Gaza, have weighed on equities in the past week and traders expected the market to remain jittery.
"There will probably be some relief early on but with some risk-off remaining," Mike Reuter, a broker at Tradition, said. "There's no resolution to the conflict. Fighting in Donetsk continues and the Gaza conflict is also ongoing." Continuación...