House of Commons Defence Committee chair Rory Stewart said:
The risk of attack by Russia on a Nato member state, whilst still small, is significant. We are not convinced that Nato is ready for this threat.
Nato has been too complacent about the threat from Russia, and it is not well-prepared.
Even worse, the nature of Russian tactics is changing fast - including cyber-attacks, information warfare, and the backing of irregular 'separatist groups', combining armed civilians with Russian Special Forces operating without insignia.
We have already seen how these tactics have been deployed by Russia and its proxies in Ukraine to destabilise a Nato partner state, annex part of its territory, and paralyse its ability to respond.
More top news
Harry Brust was first prescribed the drugs to treat a skin condition as a child - but it led to him becoming addicted to heroin.
Low pressure will keep the weather cloudy and wet for many areas overnight.
MPs defeat Labour amendment on 1% cap on annual rises after the Government earlier confirmed the policy would stay after several u-turns.