June 3 (Reuters) - Britain's FTSE 100 .FTSE index is seen opening higher on Tuesday, with futures FFIc1 up 0.09%.

* SPIRENT COMMUNICATIONS: The U.S. government will require Keysight Technologies KEYS.N to divest three of Spirent Communications' SPT.L businesses to resolve antitrust concerns before it buys the British company.

* CMR SURGICAL: UK-based medical device company CMR Surgical has put itself up for sale at a valuation of up to $4 billion, the Financial Times reported on Tuesday, citing sources familiar with the matter.

* DEFENCE: Britain said on Monday it would radically change its approach to defence to address threats from Russia, nuclear risks and cyber-attacks by investing in drones and digital warfare.

* OIL: Oil prices ticked up on Tuesday on concerns about supply, with Iran set to reject a U.S. nuclear deal proposal, while weakness in the dollar also supported prices.

* GOLD: Gold prices fell on Tuesday, retreating from near a four-week high, as a modest rise in the dollar weighed on the metal, although uncertainty over the U.S.-China trade agreement kept investors cautious and limited the bullion's decline.

* METALS: London copper prices held steady as investors weighed a weaker U.S. currency and renewed concerns over the possible tariffs on the metal against support from declining inventories.

* The UK blue-chip index .FTSE ended flat on Monday as losses in consumer staples and healthcare shares offset gains in heavyweight energy shares, with investors' focus on global trade after U.S. President Donald Trump's latest tariff threat.

* UK CORPORATE DIARY:

* For more on the factors affecting European stocks, please click on: LIVE/

TODAY'S UK PAPERS> Financial Times PRESS/FT> Other business headlines PRESS/GB

(Reporting by Nithyashree R B in Bengaluru)

((NithyashreeRB@thomsonreuters.com;))