Russia acting like Germany before outbreak of world wars – Cameron

An armed pro-Russian separatist looks back next to a vehicle of the OSCE's monitoring mission in Ukraine, on the way to the site in eastern Ukraine where the downed Malaysia Airlines flight MH17 crashed, outside Donetsk

Ben Farmer and Christopher Hope
© Telegraph Media Group Limited

BRITAIN'S ability to deal with an aggressive Russia has been "seriously degraded in recent years" and the Ukraine crisis should be a "wake-up call" to Nato, MPs will warn today.

The crisis represents a "game-changer" for Britain's defence policy and shows that its armed forces not only must deal with terrorists from failed states, but also "focus on the defence of Europe against Russia".