Navy says it is spending 25% more time monitoring Russian vessels around UK waters

Warning of increased activity as patrols spent 21 days in July shadowing Moscow's ships in Dover Strait and North Sea

The Royal Navy has warned of increasing Russian activity around the UK's waters after it spent 21 days in July monitoring Moscow's ships.

Naval operations to monitor Russian vessels increased by 25% last month compared with the previous year, with warships making repeated voyages through the strait of Dover and the North Sea.