https://www.dailymail.co.uk/news/article-14461597/Washington-BANS-Britain-sharing-US-military-intelligence-Ukraine.html
Since the conflict began three years ago, the UK and other Western security partners such as Australia and New Zealand have shared such knowledge with Ukraine.
But the Mail has learnt the top-level security classification has now been removed by the United States pending further notification and is likely to impact upon Kyiv's ability to defend itself against Russia's continuing onslaught.
The ban affects the likes of the UK's GCHQ, the spy agencies and intelligence branches of the Ministry of Defence.
Last night, UK military intelligence expert Phil Ingram told the Mail: 'The United States's instruction to stop allies sharing US-derived intelligence with Ukraine is what I would expect.
'The US's intelligence partners, including Britain, have had their authority to pass on intelligence revoked.
'The US will tightly control distribution of its intelligence to Ukraine through agencies based in Kyiv.'