Nothing significant was reported from the UK's first Nato "Eastern Sentry" operation. Estonia's foreign ministry also said three Russian jets entered its airspace without permission on Friday and remained there for 12 minutes. He said: "RAF Typhoons have now flown their first air defence mission over Poland, sending a clear signal: Nato airspace will be defended. "This sortie marks the RAF's first operational mission on Eastern Sentry, reinforcing the UK's steadfast commitment to Nato and its allies. "RAF Typhoons, supported by Voyager air-air refuelling aircraft, joined allies along the eastern flank to bolster Nato defence and deterrence.